Singular Nouns Starting with O

O (n.) The letter O, or its sound.

O (n.) Something shaped like the letter O; a circle or oval.

O (n.) A cipher; zero.

Oad (n.) See Woad.

Oaf (n.) Originally, an elf's child; a changeling left by fairies or goblins; hence, a deformed or foolish child; a simpleton; an idiot.

Oak (n.) Any tree or shrub of the genus Quercus. The oaks have alternate leaves, often variously lobed, and staminate flowers in catkins. The fruit is a smooth nut, called an acorn, which is more or less inclosed in a scaly involucre called the cup or cupule. There are now recognized about three hundred species, of which nearly fifty occur in the United States, the rest in Europe, Asia, and the other parts of North America, a very few barely reaching the northern parts of South America and >

Oak (n.) The strong wood or timber of the oak.

Oaker (n.) See Ocher.

Oakling (n.) A young oak.

Oakum (n.) The material obtained by untwisting and picking into loose fiber old hemp ropes; -- used for calking the seams of ships, stopping leaks, etc.

Oakum (n.) The coarse portion separated from flax or hemp in nackling.

Oaky (n.) Resembling oak; strong.

Oarfish (n.) The ribbon fish.

Oarfoot (n.) Any crustacean of the genus Remipes.

Oarlock (n.) The notch, fork, or other device on the gunwale of a boat, in which the oar rests in rowing. See Rowlock.

Oarsman (n.) One who uses, or is skilled in the use of, an oar; a rower.

Oarsweed (n.) Any large seaweed of the genus Laminaria; tangle; kelp. See Kelp.

Oasis (n.) A fertile or green spot in a waste or desert, esp. in a sandy desert.

Oast (n.) A kiln to dry hops or malt; a cockle.

Oat (n.) A well-known cereal grass (Avena sativa), and its edible grain; -- commonly used in the plural and in a collective sense.

Oat (n.) A musical pipe made of oat straw.

Oatcake (n.) A cake made of oatmeal.

Oath (n.) A solemn affirmation or declaration, made with a reverent appeal to God for the truth of what is affirmed.

Oath (n.) A solemn affirmation, connected with a sacred object, or one regarded as sacred, as the temple, the altar, the blood of Abel, the Bible, the Koran, etc.

Oath (n.) An appeal (in verification of a statement made) to a superior sanction, in such a form as exposes the party making the appeal to an indictment for perjury if the statement be false.

Oath (n.) A careless and blasphemous use of the name of the divine Being, or anything divine or sacred, by way of appeal or as a profane exclamation or ejaculation; an expression of profane swearing.

Oathbreaking (n.) The violation of an oath; perjury.

Oatmeal (n.) Meal made of oats.

Oatmeal (n.) A plant of the genus Panicum; panic grass.

Obdiplostemony (n.) The condition of being obdiplostemonous.

Obdormition (n.) Sleep.

Obduction (n.) The act of drawing or laying over, as a covering.

Obduracy (n.) The duality or state of being obdurate; invincible hardness of heart; obstinacy.

Obduration (n.) A hardening of the heart; hardness of heart.

Obdureness (n.) Alt. of Obduredness

Obduredness (n.) Hardness.

Obbe (n.) See Obi.

Obeah (n.) Same as Obi.

Obedience (n.) The act of obeying, or the state of being obedient; compliance with that which is required by authority; subjection to rightful restraint or control.

Obedience (n.) Words or actions denoting submission to authority; dutifulness.

Obedience (n.) A following; a body of adherents; as, the Roman Catholic obedience, or the whole body of persons who submit to the authority of the pope.

Obedience (n.) A cell (or offshoot of a larger monastery) governed by a prior.

Obedience (n.) One of the three monastic vows.

Obedience (n.) The written precept of a superior in a religious order or congregation to a subject.

Obedienciary (n.) One yielding obedience.

Obeisance (n.) Obedience.

Obeisance (n.) A manifestation of obedience; an expression of difference or respect; homage; a bow; a courtesy.

Obeisancy (n.) See Obeisance.

Obelion (n.) The region of the skull between the two parietal foramina where the closure of the sagittal suture usually begins.

Obelisk (n.) An upright, four-sided pillar, gradually tapering as it rises, and terminating in a pyramid called pyramidion. It is ordinarily monolithic. Egyptian obelisks are commonly covered with hieroglyphic writing from top to bottom.

Obelisk (n.) A mark of reference; -- called also dagger [/]. See Dagger, n., 2.

Obelus (n.) A mark [thus /, or O ]; -- so called as resembling a needle. In old MSS. or editions of the classics, it marks suspected passages or readings.

Oberon (n.) The king of the fairies, and husband of Titania or Queen Mab.

Oberration (n.) A wandering about.

Obeseness (n.) Quality of being obese; obesity.

Obesity (n.) The state or quality of being obese; incumbrance of flesh.

Obeyer (n.) One who yields obedience.

Obfirmation (n.) Hardness of heart; obduracy.

Obfuscation (n.) The act of darkening or bewildering; the state of being darkened.

Obi (n.) A species of sorcery, probably of African origin, practiced among the negroes of the West Indies.

Obi (n.) A charm or fetich.

Obit (n.) Death; decease; the date of one's death.

Obit (n.) A funeral solemnity or office; obsequies.

Obit (n.) A service for the soul of a deceased person on the anniversary of the day of his death.

Obituary (n.) That which pertains to, or is called forth by, the obit or death of a person; esp., an account of a deceased person; a notice of the death of a person, accompanied by a biographical sketch.

Obituary (n.) A list of the dead, or a register of anniversary days when service is performed for the dead.

Objection (n.) The act of objecting; as, to prevent agreement, or action, by objection.

Objection (n.) That which is, or may be, presented in opposition; an adverse reason or argument; a reason for objecting; obstacle; impediment; as, I have no objection to going; unreasonable objections.

Objection (n.) Cause of trouble; sorrow.

Objectist (n.) One who adheres to, or is skilled in, the objective philosophy.

Objectivation (n.) Converting into an object.

Objective (n.) The objective case.

Objective (n.) An object glass. See under Object, n.

Objective (n.) Same as Objective point, under Objective, a.

Objectiveness (n.) Objectivity.

Objectivity (n.) The state, quality, or relation of being objective; character of the object or of the objective.

Objector (n.) One who objects; one who offers objections to a proposition or measure.

Objicient (n.) One who makes objection; an objector.

Objuration (n.) A binding by oath.

Objurgation (n.) The act of objurgating; reproof.

Oblateness (n.) The quality or state of being oblate.

Oblation (n.) The act of offering, or of making an offering.

Oblation (n.) Anything offered or presented in worship or sacred service; an offering; a sacrifice.

Oblation (n.) A gift or contribution made to a church, as for the expenses of the eucharist, or for the support of the clergy and the poor.

Oblationer (n.) One who makes an offering as an act worship or reverence.

Oblatration (n.) The act of oblatrating; a barking or snarling.

Oblatum (n.) An oblate spheroid; a figure described by the revolution of an ellipse about its minor axis. Cf. Oblongum.

Oblectation (n.) The act of pleasing highly; the state of being greatly pleased; delight.

Obligation (n.) The act of obligating.

Obligation (n.) That which obligates or constrains; the binding power of a promise, contract, oath, or vow, or of law; that which constitutes legal or moral duty.

Obligation (n.) Any act by which a person becomes bound to do something to or for anouther, or to forbear something; external duties imposed by law, promise, or contract, by the relations of society, or by courtesy, kindness, etc.

Obligation (n.) The state of being obligated or bound; the state of being indebted for an act of favor or kindness; as, to place others under obligations to one.

Obligation (n.) A bond with a condition annexed, and a penalty for nonfulfillment. In a larger sense, it is an acknowledgment of a duty to pay a certain sum or do a certain things.

Obligatoriness (n.) The quality or state of being obligatory.

Obligee (n.) The person to whom another is bound, or the person to whom a bond is given.

Obligement (n.) Obligation.

Obliger (n.) One who, or that which, obliges.

Obligor (n.) The person who binds himself, or gives his bond to another.

Obliquation (n.) The act of becoming oblique; a turning to one side; obliquity; as, the obliquation of the eyes.

Obliquation (n.) Deviation from moral rectitude.

Oblique (n.) An oblique

Obliqueness (n.) Quality or state of being oblique.

Obliquity (n.) The condition of being oblique; deviation from a right

Obliquity (n.) Deviation from ordinary rules; irregularity; deviation from moral rectitude.

Obliteration (n.) The act of obliterating, or the state of being obliterated; extinction.

Oblivion (n.) The act of forgetting, or the state of being forgotten; cessation of remembrance; forgetfulness.

Oblivion (n.) Official ignoring of offenses; amnesty, or general pardon; as, an act of oblivion.

Oblocutor (n.) A disputer; a gainsayer.

Oblong (n.) A rectangular figure longer than it is broad; hence, any figure longer than it is broad.

Oblongata (n.) The medulla oblongata.

Oblongness (n.) State or quality of being oblong.

Oblongum (n.) A prolate spheroid; a figure described by the revolution of an ellipse about its greater axis. Cf. Oblatum, and see Ellipsoid of revolution, under Ellipsoid.

Obloquy (n.) Censorious speech; defamatory language; language that casts contempt on men or their actions; blame; reprehension.

Obloquy (n.) Cause of reproach; disgrace.

Obluctation (n.) A struggle against; resistance; opposition.

Obmutescence (n.) A becoming dumb; loss of speech.

Obmutescence (n.) A keeping silent or mute.

Oboe (n.) One of the higher wind instruments in the modern orchestra, yet of great antiquity, having a penetrating pastoral quality of tone, somewhat like the clarinet in form, but more slender, and sounded by means of a double reed; a hautboy.

Oboist (n.) A performer on the oboe.

Obole (n.) A weight of twelve grains; or, according to some, of ten grains, or half a scruple.

Obolo (n.) A copper coin, used in the Ionian Islands, about one cent in value.

Obolus (n.) A small silver coin of Athens, the sixth part of a drachma, about three cents in value.

Obolus (n.) An ancient weight, the sixth part of a drachm.

Obreption (n.) The act of creeping upon with secrecy or by surprise.

Obreption (n.) The obtaining gifts of escheat by fraud or surprise.

Obrok (n.) A rent.

Obrok (n.) A poll tax paid by peasants absent from their lord's estate.

Obscenity (n.) That quality in words or things which presents what is offensive to chasity or purity of mind; obscene or impure lanquage or acts; moral impurity; lewdness; obsceneness; as, the obscenity of a speech, or a picture.

Obscurant (n.) One who obscures; one who prevents enlightenment or hinders the progress of knowledge and wisdom.

Obscurantism (n.) The system or the principles of the obscurants.

Obscurantist (n.) Same as Obscurant.

Obscure (n.) Obscurity.

Obscurement (n.) The act of obscuring, or the state of being obscured; obscuration.

Obscureness (n.) Obscurity.

Obscurer (n.) One who, or that which, obscures.

Obscurity (n.) The quality or state of being obscure; darkness; privacy; inconspicuousness; unintelligibleness; uncertainty.

Obsecration (n.) The act of obsecrating or imploring; as, the obsecrations of the Litany, being those clauses beginning with "By."

Obsecration (n.) A figure of speech in which the orator implores the assistance of God or man.

Obsequience (n.) Obsequiousness.

Obsequiousness (n.) The quality or state of being obsequious.

Obsequy (n.) The last duty or service to a person, rendered after his death; hence, a rite or ceremony pertaining to burial; -- now used only in the plural.

Obsequy (n.) Obsequiousness.

Observance (n.) The act or practice of observing or noticing with attention; a heeding or keeping with care; performance; -- usually with a sense of strictness and fidelity; as, the observance of the Sabbath is general; the strict observance of duties.

Observance (n.) An act, ceremony, or rite, as of worship or respect; especially, a customary act or service of attention; a form; a practice; a rite; a custom.

Observance (n.) Servile attention; sycophancy.

Observancy (n.) Observance.

Observandum (n.) A thing to be observed.

Observant (n.) One who observes forms and rules.

Observant (n.) A sycophantic servant.

Observant (n.) An Observantine.

Observantine (n.) One of a branch of the Order of Franciscans, who profess to adhere more strictly than the Conventuals to the intention of the founder, especially as to poverty; -- called also Observants.

Observation (n.) The act or the faculty of observing or taking notice; the act of seeing, or of fixing the mind upon, anything.

Observation (n.) The result of an act, or of acts, of observing; view; reflection; conclusion; judgment.

Observation (n.) Hence: An expression of an opinion or judgment upon what one has observed; a remark.

Observation (n.) Performance of what is prescribed; adherence in practice; observance.

Observation (n.) The act of recognizing and noting some fact or occurrence in nature, as an aurora, a corona, or the structure of an animal.

Observation (n.) Specifically, the act of measuring, with suitable instruments, some magnitude, as the time of an occultation, with a clock; the right ascension of a star, with a transit instrument and clock; the sun's altitude, or the distance of the moon from a star, with a sextant; the temperature, with a thermometer, etc.

Observation (n.) The information so acquired.

Observator (n.) One who observes or takes notice.

Observator (n.) One who makes a remark.

Observatory (n.) A place or building for making observations on the heavenly bodies.

Observatory (n.) A building fitted with instruments for making systematic observations of any particular class or series of natural phenomena.

Observatory (n.) A place, as an elevated chamber, from which a view may be observed or commanded.

Observatory (n.) A lookout on a flank of a battery whence an officer can note the range and effect of the fire.

Observer (n.) One who observes, or pays attention to, anything; especially, one engaged in, or trained to habits of, close and exact observation; as, an astronomical observer.

Observer (n.) One who keeps any law, custom, regulation, rite, etc.; one who conforms to anything in practice.

Observer (n.) One who fulfills or performs; as, an observer of his promises.

Observer (n.) A sycophantic follower.

Observership (n.) The office or work of an observer.

Obsession (n.) The act of besieging.

Obsession (n.) The state of being besieged; -- used specifically of a person beset by a spirit from without.

Obsidian (n.) A kind of glass produced by volcanoes. It is usually of a black color, and opaque, except in thin splinters.

Obsigillation (n.) A sealing up.

Obsignation (n.) The act of sealing or ratifying; the state of being sealed or confirmed; confirmation, as by the Holy Spirit.

Obsolescence (n.) The state of becoming obsolete.

Obsoleteness (n.) The state of being obsolete, or no longer used; a state of desuetude.

Obsoleteness (n.) Indistinctness; want of development.

Obsoletism (n.) A disused word or phrase; an archaism.

Obstancy (n.) Opposition; impediment; obstruction.

Obstetrication (n.) The act of assisting as a midwife; delivery.

Obstetrician (n.) One skilled in obstetrics; an accoucheur.

Obstetrics (n.) The science of midwifery; the art of assisting women in parturition, or in the trouble incident to childbirth.

Obstetricy (n.) Obstetrics.

Obstinacy (n.) A fixedness in will, opinion, or resolution that can not be shaken at all, or only with great difficulty; firm and usually unreasonable adherence to an opinion, purpose, or system; unyielding disposition; stubborness; pertinacity; persistency; contumacy.

Obstinacy (n.) The quality or state of being difficult to remedy, relieve, or subdue; as, the obstinacy of a disease or evil.

Obstination (n.) Obstinacy; stubbornness.

Obstipation (n.) The act of stopping up, as a passage.

Obstipation (n.) Extreme constipation.

Obstriction (n.) The state of being constrained, bound, or obliged; that which constrains or obliges; obligation; bond.

Obstructer (n.) One who obstructs or hinders.

Obstruction (n.) The act of obstructing, or state of being obstructed.

Obstruction (n.) That which obstructs or impedes; an obstacle; an impediment; a hindrance.

Obstruction (n.) The condition of having the natural powers obstructed in their usual course; the arrest of the vital functions; death.

Obstructionism (n.) The act or the policy of obstructing progress.

Obstructionist (n.) One who hinders progress; one who obstructs business, as in a legislative body.

Obstructive (n.) An obstructive person or thing.

Obstruent (n.) Anything that obstructs or closes a passage; esp., that which obstructs natural passages in the body; as, a medicine which acts as an obstruent.

Obstupefaction (n.) See Stupefaction.

Obtainer (n.) One who obtains.

Obtainment (n.) The act or process of obtaining; attainment.

Obtenebration (n.) The act of darkening; the state of being darkened; darkness.

Obtension (n.) The act of obtending.

Obtestation (n.) The act of obtesting; supplication; protestation.

Obtrectation (n.) Slander; detraction; calumny.

Obtruder (n.) One who obtrudes.

Obtruncation (n.) The act of lopping or cutting off.

Obtrusion (n.) The act of obtruding; a thrusting upon others by force or unsolicited; as, the obtrusion of crude opinions on the world.

Obtrusion (n.) That which is obtruded.

Obtrusionist (n.) One who practices or excuses obtrusion.

Obtundent (n.) A substance which sheathes a part, or blunts irritation, usually some bland, oily, or mucilaginous matter; -- nearly the same as demulcent.

Obtunder (n.) That which obtunds or blunts; especially, that which blunts sensibility.

Obturation (n.) The act of stopping up, or closing, an opening.

Obturator (n.) That which closes or stops an opening.

Obturator (n.) An apparatus designed to close an unnatural opening, as a fissure of the palate.

Obtuseness (n.) State or quality of being obtuse.

Obtusion (n.) The act or process of making obtuse or blunt.

Obtusion (n.) The state of being dulled or blunted; as, the obtusion of the senses.

Obtusity (n.) Obtuseness.

Obumbration (n.) Act of darkening or obscuring.

Obvention (n.) The act of happening incidentally; that which happens casually; an incidental advantage; an occasional offering.

Obversion (n.) The act of turning toward or downward.

Obversion (n.) The act of immediate inference, by which we deny the opposite of anything which has been affirmed; as, all men are mortal; then, by obversion, no men are immortal. This is also described as "immediate inference by privative conception."

Obviation (n.) The act of obviating, or the state of being obviated.

Oby (n.) See Obi.

Oca (n.) A Peruvian name for certain species of Oxalis (O. crenata, and O. tuberosa) which bear edible tubers.

Occamy (n.) An alloy imitating gold or silver.

Occasion (n.) A falling out, happening, or coming to pass; hence, that which falls out or happens; occurrence; incident.

Occasion (n.) A favorable opportunity; a convenient or timely chance; convenience.

Occasion (n.) An occurrence or condition of affairs which brings with it some unlooked-for event; that which incidentally brings to pass an event, without being its efficient cause or sufficient reason; accidental or incidental cause.

Occasion (n.) Need; exigency; requirement; necessity; as, I have no occasion for firearms.

Occasion (n.) A reason or excuse; a motive; a persuasion.

Occasionalism (n.) The system of occasional causes; -- a name given to certain theories of the Cartesian school of philosophers, as to the intervention of the First Cause, by which they account for the apparent reciprocal action of the soul and the body.

Occasionality (n.) Quality or state of being occasional; occasional occurrence.

Occasioner (n.) One who, or that which, occasions, causes, or produces.

Occecation (n.) The act of making blind, or the state of being blind.

Occident (n.) The part of the horizon where the sun last appears in the evening; that part of the earth towards the sunset; the west; -- opposed to orient. Specifically, in former times, Europe as opposed to Asia; now, also, the Western hemisphere.

Occipital (n.) The occipital bone.

Occiput (n.) The back, or posterior, part of the head or skull; the region of the occipital bone.

Occiput (n.) A plate which forms the back part of the head of insects.

Occision (n.) A killing; the act of killing.

Occludent (n.) That which closes or shuts up.

Occlusion (n.) The act of occluding, or the state of being occluded.

Occlusion (n.) The transient approximation of the edges of a natural opening; imperforation.

Occultation (n.) The hiding of a heavenly body from sight by the intervention of some other of the heavenly bodies; -- applied especially to eclipses of stars and planets by the moon, and to the eclipses of satellites of planets by their primaries.

Occultation (n.) Fig.: The state of being occult.

Occulting (n.) Same as Occultation.

Occultism (n.) A certain Oriental system of theosophy.

Occultist (n.) An adherent of occultism.

Occultness (n.) State or quality of being occult.

Occupancy (n.) The act of taking or holding possession; possession; occupation.

Occupant (n.) One who occupies, or takes possession; one who has the actual use or possession, or is in possession, of a thing.

Occupant (n.) A prostitute.

Occupation (n.) The act or process of occupying or taking possession; actual possession and control; the state of being occupied; a holding or keeping; tenure; use; as, the occupation of lands by a tenant.

Occupation (n.) That which occupies or engages the time and attention; the principal business of one's life; vocation; employment; calling; trade.

Occupier (n.) One who occupies, or has possession.

Occupier (n.) One who follows an employment; hence, a tradesman.

Occurrence (n.) A coming or happening; as, the occurence of a railway collision.

Occurrence (n.) Any incident or event; esp., one which happens without being designed or expected; as, an unusual occurrence, or the ordinary occurrences of life.

Occurrent (n.) One who meets; hence, an adversary.

Occurrent (n.) Anything that happens; an occurrence.

Occurse (n.) Same as Occursion.

Occursion (n.) A meeting; a clash; a collision.

Ocean (n.) The whole body of salt water which covers more than three fifths of the surface of the globe; -- called also the sea, or great sea.

Ocean (n.) One of the large bodies of water into which the great ocean is regarded as divided, as the Atlantic, Pacific, Indian, Arctic and Antarctic oceans.

Ocean (n.) An immense expanse; any vast space or quantity without apparent limits; as, the boundless ocean of eternity; an ocean of affairs.

Oceanography (n.) A description of the ocean.

Oceanology (n.) That branch of science which relates to the ocean.

Oceanus (n.) The god of the great outer sea, or the river which was believed to flow around the whole earth.

Ocellus (n.) A little eye; a minute simple eye found in many invertebrates.

Ocellus (n.) An eyelike spot of color, as those on the tail of the peacock.

Ocelot (n.) An American fe

Ocher (n.) Alt. of Ochre

Ochre (n.) A impure earthy ore of iron or a ferruginous clay, usually red (hematite) or yellow (limonite), -- used as a pigment in making paints, etc. The name is also applied to clays of other colors.

Ochre (n.) A metallic oxide occurring in earthy form; as, tungstic ocher or tungstite.

Ochimy (n.) See Occamy.

Ochlesis (n.) A general morbid condition induced by the crowding together of many persons, esp. sick persons, under one roof.

Ochlocracy (n.) A form of government by the multitude; a mobocracy.

Ochre (n.) See Ocher.

Ochrea (n.) A greave or legging.

Ochrea (n.) A kind of sheath formed by two stipules united round a stem.

Ochymy (n.) See Occamy.

Ocra (n.) See Okra.

Ocrea (n.) See Ochrea.

Octachord (n.) An instrument of eight strings; a system of eight tones.

Octad (n.) An atom or radical which has a valence of eight, or is octavalent.

Octaemeron (n.) A fast of eight days before a great festival.

Octagon (n.) A plane figure of eight sides and eight angles.

Octagon (n.) Any structure (as a fortification) or place with eight sides or angles.

Octahedrite (n.) Titanium dioxide occurring in acute octahedral crystals.

Octahedron (n.) A solid bounded by eight faces. The regular octahedron is contained by eight equal equilateral triangles.

Octameter (n.) A verse containing eight feet; as, --//Deep# in|to# the | dark#ness | peer#ing, | long# I | stood# there | wond'#ring, | fear#ing.

Octander (n.) One of the Octandria.

Octane (n.) Any one of a group of metametric hydrocarcons (C8H18) of the methane series. The most important is a colorless, volatile, inflammable liquid, found in petroleum, and a constituent of benzene or ligroin.

Octant (n.) The eighth part of a circle; an arc of 45 degrees.

Octant (n.) The position or aspect of a heavenly body, as the moon or a planet, when half way between conjunction, or opposition, and quadrature, or distant from another body 45 degrees.

Octant (n.) An instrument for measuring angles (generally called a quadrant), having an arc which measures up to 9O!, but being itself the eighth part of a circle. Cf. Sextant.

Octant (n.) One of the eight parts into which a space is divided by three coordinate planes.

Octaroon (n.) See Octoroon.

Octateuch (n.) A collection of eight books; especially, the first eight books of the Old Testament.

Octave (n.) The eighth day after a church festival, the festival day being included; also, the week following a church festival.

Octave (n.) The eighth tone in the scale; the interval between one and eight of the scale, or any interval of equal length; an interval of five tones and two semitones.

Octave (n.) The whole diatonic scale itself.

Octave (n.) The first two stanzas of a sonnet, consisting of four verses each; a stanza of eight

Octave (n.) A small cask of wine, the eighth part of a pipe.

Octavo (n.) A book composed of sheets each of which is folded into eight leaves; hence, indicating more or less definitely a size of book so made; -- usually written 8vo or 8!.

Octene (n.) Same as Octylene.

Octet (n.) A composition for eight parts, usually for eight solo instruments or voices.

Octic (n.) A quantic of the eighth degree.

Octile (n.) Same as Octant, 2.

Octillion (n.) According to the French method of numeration (which method is followed also in the United States) the number expressed by a unit with twenty-seven ciphers annexed. According to the English method, the number expressed by a unit with forty-eight ciphers annexed. See Numeration.

Octoate (n.) A salt of an octoic acid; a caprylate.

October (n.) The tenth month of the year, containing thirty-one days.

October (n.) Ale or cider made in that month.

Octochord (n.) See Octachord.

Octodecimo (n.) A book composed of sheets each of which is folded into eighteen leaves; hence; indicating more or less definitely a size of book, whose sheets are so folded; -- usually written 18mo or 18!, and called eighteenmo.

Octogamy (n.) A marrying eight times.

Octogenarian (n.) A person eighty years, or more, of age.

Octogild (n.) A pecuniary compensation for an injury, of eight times the value of the thing.

Octonaphthene (n.) A colorless liquid hydrocarbon of the octylene series, occurring in Caucasian petroleum.

Octopede (n.) An animal having eight feet, as a spider.

Octopod (n.) One of the Octocerata.

Octopus (n.) A genus of eight-armed cephalopods, including numerous species, some of them of large size. See Devilfish,

Octoroon (n.) The offspring of a quadroon and a white person; a mestee.

Octostyle (n.) An octostyle portico or temple.

Octosyllable (n.) A word of eight syllables.

Octoyl (n.) A hypothetical radical (C8H15O), regarded as the essential residue of octoic acid.

Octroi (n.) A privilege granted by the sovereign authority, as the exclusive right of trade granted to a guild or society; a concession.

Octroi (n.) A tax levied in money or kind at the gate of a French city on articles brought within the walls.

Octuor (n.) See Octet.

Octyl (n.) A hypothetical hydrocarbon radical regarded as an essential residue of octane, and as entering into its derivatives; as, octyl alcohol.

Octylene (n.) Any one of a series of metameric hydrocarbons (C8H16) of the ethylene series. In general they are combustible, colorless liquids.

Ocular (n.) The eyepiece of an optical instrument, as of a telescope or microscope.

Oculina (n.) A genus of tropical corals, usually branched, and having a very volid texture.

Oculist (n.) One skilled in treating diseases of the eye.

Oculomotor (n.) The oculomotor nerve.

Oculus (n.) An eye; (Bot.) a leaf bud.

Oculus (n.) A round window, usually a small one.

Ocypodian (n.) One of a tribe of crabs which live in holes in the sand along the seashore, and run very rapidly, -- whence the name.

Od (n.) An alleged force or natural power, supposed, by Reichenbach and others, to produce the phenomena of mesmerism, and to be developed by various agencies, as by magnets, heat, light, chemical or vital action, etc.; -- called also odyle or the odylic force.

Odalisque (n.) A female slave or concubine in the harem of the Turkish sultan.

Oddity (n.) The quality or state of being odd; singularity; queerness; peculiarity; as, oddity of dress, manners, and the like.

Oddity (n.) That which is odd; as, a collection of oddities.

Oddness (n.) The state of being odd, or not even.

Oddness (n.) Singularity; strangeness; eccentricity; irregularity; uncouthness; as, the oddness of dress or shape; the oddness of an event.

Ode (n.) A short poetical composition proper to be set to music or sung; a lyric poem; esp., now, a poem characterized by sustained noble sentiment and appropriate dignity of style.

Odelet (n.) A little or short ode.

Odeon (n.) A kind of theater in ancient Greece, smaller than the dramatic theater and roofed over, in which poets and musicians submitted their works to the approval of the public, and contended for prizes; -- hence, in modern usage, the name of a hall for musical or dramatic performances.

Odeum (n.) See Odeon.

Odin (n.) The supreme deity of the Scandinavians; -- the same as Woden, of the German tribes.

Odist (n.) A writer of an ode or odes.

Odium (n.) Hatred; dislike; as, his conduct brought him into odium, or, brought odium upon him.

Odium (n.) The quality that provokes hatred; offensiveness.

Odmyl (n.) A volatile liquid obtained by boiling sulphur with linseed oil. It has an unpleasant garlic odor.

Odometer (n.) An instrument attached to the wheel of a vehicle, to measure the distance traversed; also, a wheel used by surveyors, which registers the miles and rods traversed.

Odometry (n.) Measurement of distances by the odometer.

Odontalgia (n.) Toothache.

Odontalgic (n.) A remedy for the toothache.

Odontalgy (n.) Same as Odontalgia.

Odontiasis (n.) Cutting of the teeth; dentition.

Odontoblast (n.) One of the more or less columnar cells on the outer surface of the pulp of a tooth; an odontoplast. They are supposed to be connected with the formation of dentine.

Odontoblast (n.) One of the cells which secrete the chitinous teeth of Mollusca.

Odontogeny (n.) Generetion, or mode of development, of the teeth.

Odontograph (n.) An instrument for marking or laying off the out

Odontography (n.) A description of the teeth.

Odontolite (n.) A fossil tooth colored a bright blue by phosphate of iron. It is used as an imitation of turquoise, and hence called bone turquoise.

Odontology (n.) The science which treats of the teeth, their structure and development.

Odontophore (n.) A special structure found in the mouth of most mollusks, except bivalves. It consists of several muscles and a cartilage which supports a chitinous radula, or lingual ribbon, armed with teeth. Also applied to the radula alone. See Radula.

Odontoplast (n.) An odontoblast.

Odontopteryx (n.) An extinct Eocene bird having the jaws strongly serrated, or dentated, but destitute of true teeth. It was found near London.

Odor (n.) Any smell, whether fragrant or offensive; scent; perfume.

Odorament (n.) A perfume; a strong scent.

Odor

Odyl (n.) Alt. of Odyle

Odyle (n.) See Od. [Archaic].

Odyssey (n.) An epic poem attributed to Homer, which describes the return of Ulysses to Ithaca after the siege of Troy.

Oecoid (n.) The colorless porous framework, or stroma, of red blood corpuscles from which the zooid, or hemoglobin and other substances of the corpuscles, may be dissolved out.

Oecology (n.) The various relations of animals and plants to one another and to the outer world.

Oeconomics (n.) See Economics.

Oeconomy (n.) See Economy.

Oedema (n.) A swelling from effusion of watery fluid in the cellular tissue beneath the skin or mucous membrance; dropsy of the subcutaneous cellular tissue.

Oeiliad (n.) Alt. of Oeillade

Oeillade (n.) A glance of the eye; an amorous look.

Oelet (n.) An eye, bud, or shoot, as of a plant; an oilet.

Oenanthate (n.) A salt of the supposed /nanthic acid.

Oenanthol (n.) An oily substance obtained by the distillation of castor oil, recognized as the aldehyde of oenanthylic acid, and hence called also oenanthaldehyde.

Oenanthone (n.) The ketone of oenanthic acid.

Oenanthyl (n.) A hydrocarbon radical formerly supposed to exist in oenanthic acid, now known to be identical with heptyl.

Oenanthylate (n.) A salt of /nanthylic acid; as, potassium oenanthylate.

Oenanthylidene (n.) A colorless liquid hydrocarbon, having a garlic odor; heptine.

Oenocyan (n.) The coloring matter of red wines.

Oenology (n.) Knowledge of wine, scientific or practical.

Oenomania (n.) Delirium tremens.

Oenomania (n.) Dipsomania.

Oenomel (n.) Wine mixed with honey; mead,

Oenometer (n.) See Alcoholometer.

Oenophilist (n.) A lover of wine.

Oestrian (n.) A gadfly.

Oestruation (n.) The state of being under oestrual influence, or of having sexual desire.

Oestrus (n.) A genus of gadflies. The species which deposits its larvae in the nasal cavities of sheep is oestrus ovis.

Oestrus (n.) A vehement desire; esp. (Physiol.), the periodical sexual impulse of animals; heat; rut.

Off (n.) The side of the field that is on the right of the wicket keeper.

Offal (n.) The rejected or waste parts of a butchered animal.

Offal (n.) A dead body; carrion.

Offal (n.) That which is thrown away as worthless or unfit for use; refuse; rubbish.

Offcut (n.) That which is cut off.

Offcut (n.) A portion ofthe printed sheet, in certain sizes of books, that is cut off before folding.

Offence (n.) See Offense.

Offendant (n.) An offender.

Offender (n.) One who offends; one who violates any law, divine or human; a wrongdoer.

Offendress (n.) A woman who offends.

Offense (n.) Alt. of Offence

Offence (n.) The act of offending in any sense; esp., a crime or a sin, an affront or an injury.

Offence (n.) The state of being offended or displeased; anger; displeasure.

Offence (n.) A cause or occasion of stumbling or of sin.

Offension (n.) Assault; attack.

Offensive (n.) The state or posture of one who offends or makes attack; aggressive attitude; the act of the attacking party; -- opposed to defensive.

Offerer (n.) One who offers; esp., one who offers something to God in worship.

Offering (n.) The act of an offerer; a proffering.

Offering (n.) That which is offered, esp. in divine service; that which is presented as an expiation or atonement for sin, or as a free gift; a sacrifice; an oblation; as, sin offering.

Offering (n.) A sum of money offered, as in church service; as, a missionary offering. Specif.: (Ch. of Eng.) Personal tithes payable according to custom, either at certain seasons as Christmas or Easter, or on certain occasions as marriages or christenings.

Offertory (n.) The act of offering, or the thing offered.

Offertory (n.) An anthem chanted, or a voluntary played on the organ, during the offering and first part of the Mass.

Offertory (n.) That part of the Mass which the priest reads before uncovering the chalice to offer up the elements for consecration.

Offertory (n.) The oblation of the elements.

Offertory (n.) The Scripture sentences said or sung during the collection of the offerings.

Offertory (n.) The offerings themselves.

Offerture (n.) Offer; proposal; overture.

Office (n.) That which a person does, either voluntarily or by appointment, for, or with reference to, others; customary duty, or a duty that arises from the relations of man to man; as, kind offices, pious offices.

Office (n.) A special duty, trust, charge, or position, conferred by authority and for a public purpose; a position of trust or authority; as, an executive or judical office; a municipal office.

Office (n.) A charge or trust, of a sacred nature, conferred by God himself; as, the office of a priest under the old dispensation, and that of the apostles in the new.

Office (n.) That which is performed, intended, or assigned to be done, by a particular thing, or that which anything is fitted to perform; a function; -- answering to duty in intelligent beings.

Office (n.) The place where a particular kind of business or service for others is transacted; a house or apartment in which public officers and others transact business; as, the register's office; a lawyer's office.

Office (n.) The company or corporation, or persons collectively, whose place of business is in an office; as, I have notified the office.

Office (n.) The apartments or outhouses in which the domestics discharge the duties attached to the service of a house, as kitchens, pantries, stables, etc.

Office (n.) Any service other than that of ordination and the Mass; any prescribed religious service.

Officeholder (n.) An officer, particularly one in the civil service; a placeman.

Officer (n.) One who holds an office; a person lawfully invested with an office, whether civil, military, or ecclesiastical; as, a church officer; a police officer; a staff officer.

Officer (n.) Specifically, a commissioned officer, in distinction from a warrant officer.

Official (n.) Of or pertaining to an office or public trust; as, official duties, or routine.

Official (n.) Derived from the proper office or officer, or from the proper authority; made or communicated by virtue of authority; as, an official statement or report.

Official (n.) Approved by authority; sanctioned by the pharmacopoeia; appointed to be used in medicine; as, an official drug or preparation. Cf. Officinal.

Official (n.) Discharging an office or function.

Officialism (n.) The state of being official; a system of official government; also, adherence to office routine; red-tapism.

Officialily (n.) See Officialty.

Officialty (n.) The charge, office, court, or jurisdiction of an official.

Officiant (n.) The officer who officiates or performs an office, as the burial office.

Officiator (n.) One who officiates.

Offing (n.) That part of the sea at a good distance from the shore, or where there is deep water and no need of a pilot; also, distance from the shore; as, the ship had ten miles offing; we saw a ship in the offing.

Offlet (n.) A pipe to let off water.

Offscouring (n.) That which is scoured off; hence, refuse; rejected matter; that which is vile or despised.

Offscum (n.) Removed scum; refuse; dross.

Offset (n.) In general, that which is set off, from, before, or against, something

Offset (n.) A short prostrate shoot, which takes root and produces a tuft of leaves, etc. See Illust. of Houseleek.

Offset (n.) A sum, account, or value set off against another sum or account, as an equivalent; hence, anything which is given in exchange or retaliation; a set-off.

Offset (n.) A spur from a range of hills or mountains.

Offset (n.) A horizontal ledge on the face of a wall, formed by a diminution of its thickness, or by the weathering or upper surface of a part built out from it; -- called also set-off.

Offset (n.) A short distance measured at right angles from a

Offset (n.) An abrupt bend in an object, as a rod, by which one part is turned aside out of

Offset (n.) A more or less distinct transfer of a printed page or picture to the opposite page, when the pages are pressed together before the ink is dry or when it is poor.

Offshoot (n.) That which shoots off or separates from a main stem, channel, family, race, etc.; as, the offshoots of a tree.

Offskip (n.) That part of a landscape which recedes from the spectator into distance.

Oftenness (n.) Frequency.

Ogam (n.) Same as Ogham.

Ogdoad (n.) A thing made up of eight parts.

Ogdoastich (n.) A poem of eight

Ogee (n.) A molding, the section of which is the form of the letter S, with the convex part above; cyma reversa. See Illust. under Cyma.

Ogee (n.) Hence, any similar figure used for any purpose.

Ogganition (n.) Snarling; grumbling.

Ogham (n.) A particular kind of writing practiced by the ancient Irish, and found in inscriptions on stones, metals, etc.

Ogive (n.) The arch or rib which crosses a Gothic vault diagonally.

Ogle (n.) An amorous side glance or look.

Ogler (n.) One who ogles.

Oglio (n.) See Olio.

Ogre (n.) An imaginary monster, or hideous giant of fairy tales, who lived on human beings; hence, any frightful giant; a cruel monster.

Ogress (n.) A female ogre.

Ogreism (n.) Alt. of Ogrism

Ogrism (n.) The character or manners of an ogre.

Ohm (n.) The standard unit in the measure of electrical resistance, being the resistance of a circuit in which a potential difference of one volt produces a current of one ampere. As defined by the International Electrical Congress in 1893, and by United States Statute, it is a resistance substantially equal to 109 units of resistance of the C.G.S. system of electro-magnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the te>

Oidium (n.) A genus of minute fungi which form a floccose mass of filaments on decaying fruit, etc. Many forms once referred to this genus are now believed to be temporary conditions of fungi of other genera, among them the vine mildew (Oidium Tuckeri), which has caused much injury to grapes.

Oil (n.) Any one of a great variety of unctuous combustible substances, not miscible with water; as, olive oil, whale oil, rock oil, etc. They are of animal, vegetable, or mineral origin and of varied composition, and they are variously used for food, for solvents, for anointing, lubrication, illumination, etc. By extension, any substance of an oily consistency; as, oil of vitriol.

Oilbird (n.) See Guacharo.

Oilcloth (n.) Cloth treated with oil or paint, and used for marking garments, covering floors, etc.

Oiler (n.) One who deals in oils.

Oiler (n.) One who, or that which, oils.

Oilery (n.) The business, the place of business, or the goods, of a maker of, or dealer in, oils.

Oi

Oillet (n.) A small opening or loophole, sometimes circular, used in mediaeval fortifications.

Oillet (n.) A small circular opening, and ring of moldings surrounding it, used in window tracery in Gothic architecture.

Oilman (n.) One who deals in oils; formerly, one who dealt in oils and pickles.

Oilnut (n.) The buffalo nut. See Buffalo nut, under Buffalo.

Oilseed (n.) Seed from which oil is expressed, as the castor bean; also, the plant yielding such seed. See Castor bean.

Oilseed (n.) A cruciferous herb (Camelina sativa).

Oilseed (n.) The sesame.

Oilskin (n.) Cloth made waterproof by oil.

Oilstone (n.) A variety of hone slate, or whetstone, used for whetting tools when lubricated with oil.

Oinement (n.) Ointment.

Oinomania (n.) See oenomania.

Ointment (n.) That which serves to anoint; any soft unctuous substance used for smearing or anointing; an unguent.

Ojo (n.) A spring, surrounded by rushes or rank grass; an oasis.

Oke (n.) A Turkish and Egyptian weight, equal to about 2/ pounds.

Oke (n.) An Hungarian and Wallachian measure, equal to about 2/ pints.

Okenite (n.) A massive and fibrous mineral of a whitish color, chiefly hydrous silicate of lime.

Oker (n.) See Ocher.

Okra (n.) An annual plant (Abelmoschus, / Hibiscus, esculentus), whose green pods, abounding in nutritious mucilage, are much used for soups, stews, or pickles; gumbo.

Old (n.) Open country.

Old-maidism (n.) The condition or characteristics of an old maid.

Oldness (n.) The state or quality of being old; old age.

Oldster (n.) An old person.

Olea (n.) A genus of trees including the olive.

Oleaginousness (n.) Oi

Oleamen (n.) A soft ointment prepared from oil.

Oleander (n.) A beautiful evergreen shrub of the Dogbane family, having clusters of fragrant red or white flowers. It is native of the East Indies, but the red variety has become common in the south of Europe. Called also rosebay, rose laurel, and South-sea rose.

Oleandrine (n.) One of several alkaloids found in the leaves of the oleander.

Oleaster (n.) The wild olive tree (Olea Europea, var. sylvestris).

Oleaster (n.) Any species of the genus Elaeagus. See Eleagnus. The small silvery berries of the common species (Elaeagnus hortensis) are called Trebizond dates, and are made into cakes by the Arabs.

Oleate (n.) A salt of oleic acid. Some oleates, as the oleate of mercury, are used in medicine by way of inunction.

Olecranon (n.) The large process at the proximal end of the ulna which projects behind the articulation with the humerus and forms the bony prominence of the elbow.

Olefine (n.) Olefiant gas, or ethylene; hence, by extension, any one of the series of unsaturated hydrocarbons of which ethylene is a type. See Ethylene.

Olein (n.) A fat, liquid at ordinary temperatures, but solidifying at temperatures below 0! C., found abundantly in both the animal and vegetable kingdoms (see Palmitin). It dissolves solid fats, especially at 30-40! C. Chemically, olein is a glyceride of oleic acid; and, as three molecules of the acid are united to one molecule of glyceryl to form the fat, it is technically known as triolein. It is also called elain.

Oleograph (n.) The form or figure assumed by a drop of oil when placed upon water or some other liquid with which it does not mix.

Oleograph (n.) A picture produced in oils by a process analogous to that of lithographic printing.

Oleomargarine (n.) A liquid oil made from animal fats (esp. beef fat) by separating the greater portion of the solid fat or stearin, by crystallization. It is mainly a mixture of olein and palmitin with some little stearin.

Oleomargarine (n.) An artificial butter made by churning this oil with more or less milk.

Oleometer (n.) An instrument for ascertaining the weight and purity of oil; an elaiometer.

Oleone (n.) An oily liquid, obtained by distillation of calcium oleate, and probably consisting of the ketone of oleic acid.

Oleoptene (n.) See Eleoptene.

Oleoresin (n.) A natural mixture of a terebinthinate oil and a resin.

Oleoresin (n.) A liquid or semiliquid preparation extracted (as from capsicum, cubebs, or ginger) by means of ether, and consisting of fixed or volatile oil holding resin in solution.

Oleosity (n.) The state or quality of being oily or fat; fatness.

Olf (n.) The European bullfinch.

Olfaction (n.) The sense by which the impressions made on the olfactory organs by the odorous particles in the atmosphere are perceived.

Olfactor (n.) A smelling organ; a nose.

Olfactory (n.) An olfactory organ; also, the sense of smell; -- usually in the plural.

Oliban (n.) See Olibanum.

Olibanum (n.) The fragrant gum resin of various species of Boswellia; Oriental frankincense.

Olibene (n.) A colorless mobile liquid of a pleasant aromatic odor obtained by the distillation of olibanum, or frankincense, and regarded as a terpene; -- called also conimene.

Olifant (n.) An elephant.

Olifant (n.) An ancient horn, made of ivory.

Oligarch (n.) A member of an oligarchy; one of the rulers in an oligarchical government.

Oligarchist (n.) An advocate or supporter of oligarchy.

Oligarchy (n.) A form of government in which the supreme power is placed in the hands of a few persons; also, those who form the ruling few.

Oligocene (n.) The Oligocene period. See the Chart of Geology.

Oligoclase (n.) A triclinic soda-lime feldspar. See Feldspar.

Oligosiderite (n.) A meteorite characterized by the presence of but a small amount of metallic iron.

Olio (n.) A dish of stewed meat of different kinds.

Olio (n.) A mixture; a medley.

Olio (n.) A collection of miscellaneous pieces.

Oliva (n.) A genus of polished marine gastropod shells, chiefly tropical, and often beautifully colored.

Olive (n.) A tree (Olea Europaea) with small oblong or elliptical leaves, axillary clusters of flowers, and oval, one-seeded drupes. The tree has been cultivated for its fruit for thousands of years, and its branches are the emblems of peace. The wood is yellowish brown and beautifully variegated.

Olive (n.) The fruit of the olive. It has been much improved by cultivation, and is used for making pickles. Olive oil is pressed from its flesh.

Olive (n.) Any shell of the genus Oliva and allied genera; -- so called from the form. See Oliva.

Olive (n.) The oyster catcher.

Olive (n.) The color of the olive, a peculiar dark brownish, yellowish, or tawny green.

Olive (n.) One of the tertiary colors, composed of violet and green mixed in equal strength and proportion.

Olive (n.) An olivary body. See under Olivary.

Olive (n.) A small slice of meat seasoned, rolled up, and cooked; as, olives of beef or veal.

Olivenite (n.) An olive-green mineral, a hydrous arseniate of copper; olive ore.

Oliver (n.) An olive grove.

Oliver (n.) An olive tree.

Oliver (n.) A small tilt hammer, worked by the foot.

Oliverian (n.) An adherent of Oliver Cromwell.

Olivewood (n.) The wood of the olive.

Olivewood (n.) An Australian name given to the hard white wood of certain trees of the genus Elaeodendron, and also to the trees themselves.

Olivil (n.) A white crystal

Olivin (n.) A complex bitter gum, found on the leaves of the olive tree; -- called also olivite.

Olivine (n.) A common name of the yellowish green mineral chrysolite, esp. the variety found in eruptive rocks.

Olivite (n.) See Olivin.

Olla (n.) A pot or jar having a wide mouth; a cinerary urn, especially one of baked clay.

Olla (n.) A dish of stewed meat; an olio; an olla-podrida.

Olla-podrida (n.) A favorite Spanish dish, consisting of a mixture of several kinds of meat chopped fine, and stewed with vegetables.

Olla-podrida (n.) Any incongruous mixture or miscellaneous collection; an olio.

Ology (n.) A colloquial or humorous name for any science or branch of knowledge.

Olpe (n.) Originally, a leather flask or vessel for oils or liquids; afterward, an earthenware vase or pitcher without a spout.

Olusatrum (n.) An umbelliferous plant, the common Alexanders of Western Europe (Smyrnium Olusatrum).

Olympiad (n.) A period of four years, by which the ancient Greeks reckoned time, being the interval from one celebration of the Olympic games to another, beginning with the victory of Cor/bus in the foot race, which took place in the year 776 b.c.; as, the era of the olympiads.

Olympionic (n.) An ode in honor of a victor in the Olympic games.

Omagra (n.) Gout in the shoulder.

Omasum (n.) The third division of the stomach of ruminants. See Manyplies, and Illust. under Ruminant.

Omber (n.) Alt. of Ombre

Ombre (n.) A game at cards, borrowed from the Spaniards, and usually played by three persons.

Ombre (n.) A large Mediterranean food fish (Umbrina cirrhosa): -- called also umbra, and umbrine.

Ombrometer (n.) An instrument for measuring the rain that falls; a rain gauge.

Omega (n.) The last letter of the Greek alphabet. See Alpha.

Omega (n.) The last; the end; hence, death.

Omelet (n.) Eggs beaten up with a little flour, etc., and cooked in a frying pan; as, a plain omelet.

Omen (n.) An occurrence supposed to portend, or show the character of, some future event; any indication or action regarded as a foreshowing; a foreboding; a presage; an augury.

Omentum (n.) A free fold of the peritoneum, or one serving to connect viscera, support blood vessels, etc.; an epiploon.

Omer (n.) A Hebrew measure, the tenth of an ephah. See Ephah.

Omination (n.) The act of ominating; presaging.

Omission (n.) The act of omitting; neglect or failure to do something required by propriety or duty.

Omission (n.) That which is omitted or is left undone.

Omittance (n.) The act of omitting, or the state of being omitted; forbearance; neglect.

Omitter (n.) One who omits.

Ommateum (n.) A compound eye, as of insects and crustaceans.

Ommatidium (n.) One of the single eyes forming the compound eyes of crustaceans, insects, and other invertebrates.

Omnibus (n.) A long four-wheeled carriage, having seats for many people; especially, one with seats running lengthwise, used in conveying passengers short distances.

Omnibus (n.) A sheet-iron cover for articles in a leer or annealing arch, to protect them from drafts.

Omniety (n.) That which is all-pervading or all-comprehensive; hence, the Deity.

Omniformity (n.) The condition or quality of having every form.

Omnigraph (n.) A pantograph.

Omniparity (n.) Equality in every part; general equality.

Omnipercipience (n.) Alt. of Omnipercipiency

Omnipercipiency (n.) Perception of everything.

Omnipotence (n.) Alt. of Omnipotency

Omnipotency (n.) The state of being omnipotent; almighty power; hence, one who is omnipotent; the Deity.

Omnipotency (n.) Unlimited power of a particular kind; as, love's omnipotence.

Omnipresence (n.) Presence in every place at the same time; unbounded or universal presence; ubiquity.

Omnipresency (n.) Omnipresence.

Omniscience (n.) The quality or state of being omniscient; -- an attribute peculiar to God.

Omnisciency (n.) Omniscience.

Omnium (n.) The aggregate value of the different stocks in which a loan to government is now usually funded.

Omnium-gatherum (n.) A miscellaneous collection of things or persons; a confused mixture; a medley.

Omoplate (n.) The shoulder blade, or scapula.

Omostegite (n.) The part of the carapace of a crustacean situated behind the cervical groove.

Omosternum (n.) The anterior element of the sternum which projects forward from between the clavicles in many batrachians and is usually tipped with cartilage.

Omosternum (n.) In many mammals, an interarticular cartilage, or bone, between the sternum and the clavicle.

Omphalocele (n.) A hernia at the navel.

Omphalode (n.) The central part of the hilum of a seed, through which the nutrient vessels pass into the rhaphe or the chalaza; -- called also omphalodium.

Omphalomancy (n.) Divination by means of a child's navel, to learn how many children the mother may have.

Omphalopsychite (n.) A name of the Hesychasts, from their habit of gazing upon the navel.

Omphalopter (n.) Alt. of Omphaloptic

Omphaloptic (n.) An optical glass that is convex on both sides.

Omphalos (n.) The navel.

Omphalotomy (n.) The operation of dividing the navel-string.

Onager (n.) A military engine acting like a sling, which threw stones from a bag or wooden bucket, and was operated by machinery.

Onager (n.) A wild ass, especially the koulan.

Onagga (n.) The dauw.

Onanism (n.) Self-pollution; masturbation.

Onappo (n.) A nocturnal South American monkey (Callithrix discolor), noted for its agility; -- called also ventriloquist monkey.

Ince (n.) The ounce.

Oncidium (n.) A genus of tropical orchidaceous plants, the flower of one species of which (O. Papilio) resembles a butterfly.

Oncograph (n.) An instrument for registering the changes observable with an oncometer.

Oncometer (n.) An instrument for measuring the variations in size of the internal organs of the body, as the kidney, spleen, etc.

Oncotomy (n.) The opening of an abscess, or the removal of a tumor, with a cutting instrument.

Onde (n.) Hatred; fury; envy.

On dit (n.) A flying report; rumor; as, it is a mere on dit.

One (n.) A single unit; as, one is the base of all numbers.

One (n.) A symbol representing a unit, as 1, or i.

One (n.) A single person or thing.

Oneberry (n.) The herb Paris. See Herb Paris, under Herb.

Oneirocriticism (n.) Alt. of Oneirocritics

Oneirocritics (n.) The art of interpreting dreams.

Oneiromancy (n.) Divination by means of dreams.

Oneiroscopist (n.) One who interprets dreams.

Oneiroscopy (n.) The interpretation of dreams.

One

Onement (n.) The state of being at one or reconciled.

Oneness (n.) The state of being one; singleness in number; individuality; unity.

Oneration (n.) The act of loading.

Ongoing (n.) The act of going forward; progress; (pl.) affairs; business; current events.

Onguent (n.) An unguent.

On-hanger (n.) A hanger-on.

Onion (n.) A liliaceous plant of the genus Allium (A. cepa), having a strong-flavored bulb and long hollow leaves; also, its bulbous root, much used as an article of food. The name is often extended to other species of the genus.

On

On-looker (n.) A looker-on.

Onocerin (n.) A white crystal

Onology (n.) Foolish discourse.

Onomancy (n.) Divination by the letters of a name; nomancy.

Onomasticon (n.) A collection of names and terms; a dictionary; specif., a collection of Greek names, with explanatory notes, made by Julius Pollux about A.D.180.

Onomatechny (n.) Prognostication by the letters of a name.

Onomatologist (n.) One versed in the history of names.

Onomatology (n.) The science of names or of their classification.

Onomatope (n.) An imitative word; an onomatopoetic word.

Onomatopoeia (n.) The formation of words in imitation of sounds; a figure of speech in which the sound of a word is imitative of the sound of the thing which the word represents; as, the buzz of bees; the hiss of a goose; the crackle of fire.

Onomatopy (n.) Onomatopoeia.

Onomomancy (n.) See Onomancy.

Onrush (n.) A rushing onward.

Onset (n.) A rushing or setting upon; an attack; an assault; a storming; especially, the assault of an army.

Onset (n.) A setting about; a beginning.

Onset (n.) Anything set on, or added, as an ornament or as a useful appendage.

Onslaught (n.) An attack; an onset; esp., a furious or murderous attack or assault.

Onslaught (n.) A bloody fray or battle.

Onstead (n.) A single farmhouse; a steading.

Ontogenesis (n.) Alt. of Ontogeny

Ontogeny (n.) The history of the individual development of an organism; the history of the evolution of the germ; the development of an individual organism, -- in distinction from phylogeny, or evolution of the tribe. Called also henogenesis, henogeny.

Ontologist (n.) One who is versed in or treats of ontology.

Ontology (n.) That department of the science of metaphysics which investigates and explains the nature and essential properties and relations of all beings, as such, or the principles and causes of being.

Onus (n.) A burden; an obligation.

Onwardness (n.) Progress; advancement.

Onycha (n.) An ingredient of the Mosaic incense, probably the operculum of some kind of strombus.

Onycha (n.) The precious stone called onyx.

Onychia (n.) A whitlow.

Onychia (n.) An affection of a finger or toe, attended with ulceration at the base of the nail, and terminating in the destruction of the nail.

Onychomancy (n.) Divination by the nails.

Onyx (n.) Chalcedony in parallel layers of different shades of color. It is used for making cameos, the figure being cut in one layer with the next as a ground.

Oo (n.) A beautiful bird (Moho nobilis) of the Hawaiian Islands. It yields the brilliant yellow feathers formerly used in making the royal robes. Called also yellow-tufted honeysucker.

Ooecium (n.) One of the special zooids, or cells, of Bryozoa, destined to receive and develop ova; an ovicell. See Bryozoa.

Oogenesis (n.) The development, or mode of origin, of the ova.

Oogonium (n.) A special cell in certain cryptogamous plants containing oospheres, as in the rockweeds (Fucus), and the orders Vaucherieae and Peronosporeae.

Ook (n.) Oak.

Oolite (n.) A variety of limestone, consisting of small round grains, resembling the roe of a fish. It sometimes constitutes extensive beds, as in the European Jurassic. See the Chart of Geology.

Oologist (n.) One versed in oology.

Oology (n.) The science of eggs in relation to their coloring, size, shape, and number.

Oolong (n.) A fragrant variety of black tea having somewhat the flavor of green tea.

Oomiac (n.) Alt. of Oomiak

Oomiak (n.) A long, broad boat used by the Eskimos.

Oopack (n.) Alt. of Oopak

Oopak (n.) A kind of black tea.

Oophore (n.) An alternately produced form of certain cryptogamous plants, as ferns, mosses, and the like, which bears antheridia and archegonia, and so has sexual fructification, as contrasted with the sporophore, which is nonsexual, but produces spores in countless number. In ferns the oophore is a minute prothallus; in mosses it is the leafy plant.

Oophorectomy (n.) Ovariotomy.

Oophoridium (n.) The macrosporangium or case for the larger kind of spores in heterosporous flowerless plants.

Oophoritis (n.) Ovaritis.

Oophyte (n.) Any plant of a proposed class or grand division (collectively termed oophytes or Oophyta), which have their sexual reproduction accomplished by motile antherozoids acting on oospheres, either while included in their oogonia or after exclusion.

Oorial (n.) A wild, bearded sheep inhabiting the Ladakh mountains. It is reddish brown, with a dark beard from the chin to the chest.

Oosperm (n.) The ovum, after fusion with the spermatozoon in impregnation.

Oospere (n.) An unfertilized, rounded mass of protoplasm, produced in an oogonium.

Oospere (n.) An analogous mass of protoplasm in the ovule of a flowering plant; an embryonic vesicle.

Oosporangium (n.) An oogonium; also, a case containing oval or rounded spores of some other kind than oospores.

Oospore (n.) A special kind of spore resulting from the fertilization of an oosphere by antherozoids.

Oospore (n.) A fertilized oosphere in the ovule of a flowering plant.

Oostegite (n.) One of the plates which in some Crustacea inclose a cavity wherein the eggs are hatched.

Ootheca (n.) An egg case, especially those of many kinds of mollusks, and of some insects, as the cockroach. Cf. Ooecium.

Ootooid (n.) Alt. of Ootocoid

Ootocoid (n.) A half oviparous, or an oviparous, mammal; a marsupial or monotreme.

Ootype (n.) The part of the oviduct of certain trematode worms in which the ova are completed and furnished with a shell.

Ooze (n.) Soft mud or slime; earth so wet as to flow gently, or easily yield to pressure.

Ooze (n.) Soft flow; spring.

Ooze (n.) The liquor of a tan vat.

Ooze (n.) To flow gently; to percolate, as a liquid through the pores of a substance or through small openings.

Ooze (n.) Fig.: To leak (out) or escape slowly; as, the secret oozed out; his courage oozed out.

Opacity (n.) The state of being opaque; the quality of a body which renders it impervious to the rays of light; want of transparency; opaqueness.

Opacity (n.) Obscurity; want of clearness.

Opah (n.) A large oceanic fish (Lampris quttatus), inhabiting the Atlantic Ocean. It is remarkable for its brilliant colors, which are red, green, and blue, with tints of purple and gold, covered with round silvery spots. Called also king of the herrings.

Opal (n.) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity.

Opalescence (n.) A reflection of a milky or pearly light from the interior of a mineral, as in the moonstone; the state or quality of being opalescent.

Opalotype (n.) A picture taken on "milky" glass.

Opaque (n.) That which is opaque; opacity.

Opaqueness (n.) The state or quality of being impervious to light; opacity.

Opeidoscope (n.) An instrument, consisting of a tube having one end open and the other end covered with a thin flexible membrance to the center of which is attached a small mirror. It is used for exhibiting upon a screen, by means of rays reflected from the mirror, the vibratory motions caused by sounds produced at the open end of the tube, as by speaking or singing into it.

Opelet (n.) A bright-colored European actinian (Anemonia, / Anthea, sulcata); -- so called because it does not retract its tentacles.

Open (n.) Open or unobstructed space; clear land, without trees or obstructions; open ocean; open water.

Openbill (n.) A bird of the genus Anastomus, allied to the stork; -- so called because the two parts of the bill touch only at the base and tip. One species inhabits India, another Africa. Called also open-beak. See Illust. (m), under Beak.

Opener (n.) One who, or that which, opens.

Opening (n.) The act or process of opening; a beginning; commencement; first appearance; as, the opening of a speech.

Opening (n.) A place which is open; a breach; an aperture; a gap; cleft, or hole.

Opening (n.) Hence: A vacant place; an opportunity; as, an opening for business.

Opening (n.) A thinly wooded space, without undergrowth, in the midst of a forest; as, oak openings.

Openness (n.) The quality or state of being open.

Openwork (n.) Anything so constructed or manufactured (in needlework, carpentry, metal work, etc.) as to show openings through its substance; work that is perforated or pierced.

Openwork (n.) A quarry; an open cut.

Opera (n.) A drama, either tragic or comic, of which music forms an essential part; a drama wholly or mostly sung, consisting of recitative, arials, choruses, duets, trios, etc., with orchestral accompaniment, preludes, and interludes, together with appropriate costumes, scenery, and action; a lyric drama.

Opera (n.) The score of a musical drama, either written or in print; a play set to music.

Opera (n.) The house where operas are exhibited.

Operameter (n.) An instrument or machine for measuring work done, especially for ascertaining the number of rotations made by a machine or wheel in manufacturing cloth; a counter.

Operance (n.) Alt. of Operancy

Operancy (n.) The act of operating or working; operation.

Operand (n.) The symbol, quantity, or thing upon which a mathematical operation is performed; -- called also faciend.

Operant (n.) An operative person or thing.

Operation (n.) The act or process of operating; agency; the exertion of power, physical, mechanical, or moral.

Operation (n.) The method of working; mode of action.

Operation (n.) That which is operated or accomplished; an effect brought about in accordance with a definite plan; as, military or naval operations.

Operation (n.) Effect produced; influence.

Operation (n.) Something to be done; some transformation to be made upon quantities, the transformation being indicated either by rules or symbols.

Operation (n.) Any methodical action of the hand, or of the hand with instruments, on the human body, to produce a curative or remedial effect, as in amputation, etc.

Operative (n.) A skilled worker; an artisan; esp., one who operates a machine in a mill or manufactory.

Operator (n.) One who, or that which, operates or produces an effect.

Operator (n.) One who performs some act upon the human body by means of the hand, or with instruments.

Operator (n.) A dealer in stocks or any commodity for speculative purposes; a speculator.

Operator (n.) The symbol that expresses the operation to be performed; -- called also facient.

Operatory (n.) A laboratory.

Opercle (n.) Any one of the bony plates which support the gill covers of fishes; an opercular bone.

Opercle (n.) An operculum.

Opercular (n.) The principal opercular bone or operculum of fishes.

Operculum (n.) The lid of a pitcherform leaf.

Operculum (n.) The lid of the urnlike capsule of mosses.

Operculum (n.) Any lidlike or operculiform process or part; as, the opercula of a dental follicle.

Operculum (n.) The fold of integument, usually supported by bony plates, which protects the gills of most fishes and some amphibians; the gill cover; the gill lid.

Operculum (n.) The principal opercular bone in the upper and posterior part of the gill cover.

Operculum (n.) The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda.

Operculum (n.) Any lid-shaped structure closing the aperture of a tube or shell.

Operetta (n.) A short, light, musical drama.

Operosity (n.) Laboriousness.

Opetide (n.) Open time; -- applied to different things

Opetide (n.) The early spring, or the time when flowers begin opening.

Opetide (n.) The time between Epiphany and Ash Wednesday wherein marriages were formerly solemnized publicly in churches. [Eng.]

Opetide (n.) The time after harvest when the common fields are open to all kinds of stock.

Ophicleide (n.) A large brass wind instrument, formerly used in the orchestra and in military bands, having a loud tone, deep pitch, and a compass of three octaves; -- now generally supplanted by bass and contrabass tubas.

Ophidian (n.) One of the Ophidia; a snake or serpent.

Ophidioid (n.) One of the Ophidiidae.

Ophidion (n.) The typical genus of ophidioid fishes. [Written also Ophidium.] See Illust. under Ophidioid.

Ophiolatry (n.) The worship of serpents.

Ophiologist (n.) One versed in the natural history of serpents.

Ophiology (n.) That part of natural history which treats of the ophidians, or serpents.

Ophiomancy (n.) Divination by serpents, as by their manner of eating, or by their coils.

Ophiomorphite (n.) An ammonite.

Ophiophagus (n.) A genus of venomous East Indian snakes, which feed on other snakes. Ophiophagus elaps is said to be the largest and most deadly of poisonous snakes.

Ophite (n.) A greenish spotted porphyry, being a diabase whose pyroxene has been altered to uralite; -- first found in the Pyreness. So called from the colored spots which give it a mottled appearance.

Ophiuchus (n.) A constellation in the Northern Hemisphere, de

Ophiura (n.) A genus of ophiurioid starfishes.

Ophiuran (n.) One of the Ophiurioidea.

Ophiurid (n.) Same as Ophiurioid.

Ophiurioid (n.) One of the Ophiurioidea.

Ophryon (n.) The supraorbital point.

Ophthalmia (n.) An inflammation of the membranes or coats of the eye or of the eyeball.

Ophthalmite (n.) An eyestalk; the organ which bears the compound eyes of decapod Crustacea.

Ophthalmologist (n.) One skilled in ophthalmology; an oculist.

Ophthalmology (n.) The science which treats of the structure, functions, and diseases of the eye.

Ophthalmometer (n.) An instrument devised by Helmholtz for measuring the size of a reflected image on the convex surface of the cornea and lens of the eye, by which their curvature can be ascertained.

Ophthalmoscope (n.) An instrument for viewing the interior of the eye, particularly the retina. Light is thrown into the eye by a mirror (usually concave) and the interior is then examined with or without the aid of a lens.

Ophthalmoscopy (n.) A branch of physiognomy which deduces the knowledge of a person's temper and character from the appearance of the eyes.

Ophthalmoscopy (n.) Examination of the eye with the ophthalmoscope.

Ophthalmy (n.) Same as Ophthalmia.

Opianine (n.) An alkaloid found in small quantity in opium. It is identical with narcotine.

Opianyl (n.) Same as Meconin.

Opiate (n.) Originally, a medicine of a thicker consistence than sirup, prepared with opium.

Opiate (n.) Any medicine that contains opium, and has the quality of inducing sleep or repose; a narcotic.

Opiate (n.) Anything which induces rest or inaction; that which quiets uneasiness.

Opie (n.) Opium.

Opifice (n.) Workmanship.

Opificer (n.) An artificer; a workman.

Opination (n.) The act of thinking; a supposition.

Opinator (n.) One fond of his own opinious; one who holds an opinion.

Opiner (n.) One who opines.

Opiniator (n.) Alt. of Opiniatre

Opiniatre (n.) One who is opinionated.

Opiniatrety (n.) Obstinacy in opinious.

Opinicus (n.) An imaginary animal borne as a charge, having wings, an eagle's head, and a short tail; -- sometimes represented without wings.

Opining (n.) Opinion.

Opinion (n.) That which is opined; a notion or conviction founded on probable evidence; belief stronger than impression, less strong than positive knowledge; settled judgment in regard to any point of knowledge or action.

Opinion (n.) The judgment or sentiment which the mind forms of persons or things; estimation.

Opinion (n.) Favorable estimation; hence, consideration; reputation; fame; public sentiment or esteem.

Opinion (n.) Obstinacy in holding to one's belief or impression; opiniativeness; conceitedness.

Opinion (n.) The formal decision, or expression of views, of a judge, an umpire, a counselor, or other party officially called upon to consider and decide upon a matter or point submitted.

Opinionatist (n.) An opinionist.

Opinionator (n.) An opinionated person; one given to conjecture.

Opinionist (n.) One fond of his own notions, or unduly attached to his own opinions.

Opisometer (n.) An instrument with a revolving wheel for measuring a curved

Opisthion (n.) The middle of the posterior, or dorsal, margin of the great foramen of the skull.

Opisthobranchiate (n.) One of the Opisthobranchiata.

Opisthodome (n.) A back chamber; especially, that part of the naos, or cella, farthest from the main entrance, sometimes having an entrance of its own, and often used as a treasury.

Opisthography (n.) A writing upon the back of anything, as upon the back of a leaf or sheet already written upon on one side.

Opisthotic (n.) The inferior and posterior of the three elements forming the periotic bone.

Opisthotonos (n.) A tetanic spasm in which the body is bent backwards and stiffened.

Opitulation (n.) The act of helping or aiding; help.

Opium (n.) The inspissated juice of the Papaver somniferum, or white poppy.

Opobalsam (n.) Alt. of Opobalsamum

Opobalsamum (n.) The old name of the aromatic resinous juice of the Balsamodendron opobalsamum, now commonly called balm of Gilead. See under Balm.

Opodeldoc (n.) A kind of plaster, said to have been invented by Mindererus, -- used for external injuries.

Opodeldoc (n.) A saponaceous, camphorated liniment; a solution of soap in alcohol, with the addition of camphor and essential oils; soap liniment.

Opopanax (n.) The inspissated juice of an umbelliferous plant (the Opoponax Chironum), brought from Turkey and the East Indies in loose granules, or sometimes in larger masses, of a reddish yellow color, with specks of white. It has a strong smell and acrid taste, and was formerly used in medicine as an emmenagogue and antispasmodic.

Opossum (n.) Any American marsupial of the genera Didelphys and Chironectes. The common species of the United States is Didelphys Virginiana.

Oppidan (n.) An inhabitant of a town.

Oppidan (n.) A student of Eton College, England, who is not a King's scholar, and who boards in a private family.

Oppilation (n.) The act of filling or crowding together; a stopping by redundant matter; obstruction, particularly in the lower intestines.

Oppletion (n.) The act of filling up, or the state of being filled up; fullness.

Opponency (n.) The act of opening an academical disputation; the proposition of objections to a tenet, as an exercise for a degree.

Opponent (n.) One who opposes; an adversary; an antagonist; a foe.

Opponent (n.) One who opposes in a disputation, argument, or other verbal controversy; specifically, one who attacks some theirs or proposition, in distinction from the respondent, or defendant, who maintains it.

Opportunism (n.) The art or practice of taking advantage of opportunities or circumstances, or of seeking immediate advantage with little regard for ultimate consequences.

Opportunist (n.) One who advocates or practices opportunism.

Opportunity (n.) Fit or convenient time; a time or place favorable for executing a purpose; a suitable combination of conditions; suitable occasion; chance.

Opportunity (n.) Convenience of situation; fitness.

Opportunity (n.) Importunity; earnestness.

Opposability (n.) The condition or quality of being opposable.

Opposal (n.) Opposition.

Oppose (n.) To place in front of, or over against; to set opposite; to exhibit.

Oppose (n.) To put in opposition, with a view to counterbalance or countervail; to set against; to offer antagonistically.

Oppose (n.) To resist or antagonize by physical means, or by arguments, etc.; to contend against; to confront; to resist; to withstand; as, to oppose the king in battle; to oppose a bill in Congress.

Oppose (n.) To compete with; to strive against; as, to oppose a rival for a prize.

Opposer (n.) One who opposes; an opponent; an antagonist; an adversary.

Opposite (n.) One who opposes; an opponent; an antagonist.

Opposite (n.) That which is opposed or contrary; as, sweetness and its opposite.

Oppositeness (n.) The quality or state of being opposite.

Opposition (n.) The act of opposing; an attempt to check, restrain, or defeat; resistance.

Opposition (n.) The state of being placed over against; situation so as to front something else.

Opposition (n.) Repugnance; contrariety of sentiment, interest, or purpose; antipathy.

Opposition (n.) That which opposes; an obstacle; specifically, the aggregate of persons or things opposing; hence, in politics and parliamentary practice, the party opposed to the party in power.

Opposition (n.) The situation of a heavenly body with respect to another when in the part of the heavens directly opposite to it; especially, the position of a planet or satellite when its longitude differs from that of the sun 180!; -- signified by the symbol /; as, / / /, opposition of Jupiter to the sun.

Opposition (n.) The relation between two propositions when, having the same subject and predicate, they differ in quantity, or in quality, or in both; or between two propositions which have the same matter but a different form.

Oppositionist (n.) One who belongs to the opposition party.

Oppression (n.) The act of oppressing, or state of being oppressed.

Oppression (n.) That which oppresses; a hardship or injustice; cruelty; severity; tyranny.

Oppression (n.) A sense of heaviness or obstruction in the body or mind; depression; dullness; lassitude; as, an oppression of spirits; an oppression of the lungs.

Oppression (n.) Ravishment; rape.

Oppressor (n.) One who oppresses; one who imposes unjust burdens on others; one who harasses others with unjust laws or unreasonable severity.

Oppressure (n.) Oppression.

Opprobrium (n.) Disgrace; infamy; reproach mingled with contempt; abusive language.

Opprobry (n.) Opprobrium.

Oppugnancy (n.) The act of oppugning; opposition; resistance.

Oppugnant (n.) An opponent.

Oppugnation (n.) Opposition.

Oppugner (n.) One who opposes or attacks; that which opposes.

Opsimathy (n.) Education late in life.

Opsiometer (n.) An instrument for measuring the limits of distincts vision in different individuals, and thus determiming the proper focal length of a lens for correcting imperfect sight.

Opsonation (n.) A catering; a buying of provisions.

Optation (n.) The act of optating; a wish.

Optative (n.) Something to be desired.

Optative (n.) The optative mood; also, a verb in the optative mood.

Optics (n.) That branch of physical science which treats of the nature and properties of light, the laws of its modification by opaque and transparent bodies, and the phenomena of vision.

Optimacy (n.) Government by the nobility.

Optimacy (n.) Collectively, the nobility.

Optimate (n.) A nobleman or aristocrat; a chief man in a state or city.

Optime (n.) One of those who stand in the second rank of honors, immediately after the wranglers, in the University of Cambridge, England. They are divided into senior and junior optimes.

Optimism (n.) The opinion or doctrine that everything in nature, being the work of God, is ordered for the best, or that the ordering of things in the universe is such as to produce the highest good.

Optimism (n.) A disposition to take the most hopeful view; -- opposed to pessimism.

Optimist (n.) One who holds the opinion that all events are ordered for the best.

Optimist (n.) One who looks on the bright side of things, or takes hopeful views; -- opposed to pessimist.

Optimity (n.) The state of being best.

Option (n.) The power of choosing; the right of choice or election; an alternative.

Option (n.) The exercise of the power of choice; choice.

Option (n.) A wishing; a wish.

Option (n.) A right formerly belonging to an archbishop to select any one dignity or benefice in the gift of a suffragan bishop consecrated or confirmed by him, for bestowal by himself when next vacant; -- annulled by Parliament in 1845.

Option (n.) A stipulated privilege, given to a party in a time contract, of demanding its fulfillment on any day within a specified limit.

Optional (n.) See Elective, n.

Optocoele (n.) Alt. of Optocoelia

Optocoelia (n.) The cavity of one of the optic lobes of the brain in many animals.

Optogram (n.) An image of external objects fixed on the retina by the photochemical action of light on the visual purple. See Optography.

Optography (n.) The production of an optogram on the retina by the photochemical action of light on the visual purple; the fixation of an image in the eye. The object so photographed shows white on a purple or red background. See Visual purple, under Visual.

Optometer (n.) An instrument for measuring the distance of distinct vision, mainly for the selection of eveglasses.

Opulence (n.) Wealth; riches; affluence.

Opulency (n.) See Opulence.

Opuntia (n.) A genus of cactaceous plants; the prickly pear, or Indian fig.

Opus (n.) A work; specif. (Mus.), a musical composition.

Opuscle (n.) Alt. of Opuscule

Opuscule (n.) A small or petty work.

Opusculum (n.) An opuscule.

Opye (n.) Opium.

Oquassa (n.) A small, handsome trout (Salvelinus oquassa), found in some of the lakes in Maine; -- called also blueback trout.

Or (n.) Yellow or gold color, -- represented in drawing or engraving by small dots.

Ora (n.) A money of account among the Anglo-Saxons, valued, in the Domesday Book, at twenty pence sterling.

Orabassu (n.) A South American monkey of the genus Callithrix, esp.

Orach (n.) Alt. of Orache

Orache (n.) A genus (Atriplex) of herbs or low shrubs of the Goosefoot family, most of them with a mealy surface.

Oracle (n.) The answer of a god, or some person reputed to be a god, to an inquiry respecting some affair or future event, as the success of an enterprise or battle.

Oracle (n.) Hence: The deity who was supposed to give the answer; also, the place where it was given.

Oracle (n.) The communications, revelations, or messages delivered by God to the prophets; also, the entire sacred Scriptures -- usually in the plural.

Oracle (n.) The sanctuary, or Most Holy place in the temple; also, the temple itself.

Oracle (n.) One who communicates a divine command; an angel; a prophet.

Oracle (n.) Any person reputed uncommonly wise; one whose decisions are regarded as of great authority; as, a literary oracle.

Oracle (n.) A wise sentence or decision of great authority.

Oraison (n.) See Orison.

Orang (n.) See Orang-outang.

Orange (n.) The fruit of a tree of the genus Citrus (C. Aurantium). It is usually round, and consists of pulpy carpels, commonly ten in number, inclosed in a leathery rind, which is easily separable, and is reddish yellow when ripe.

Orange (n.) The tree that bears oranges; the orange tree.

Orange (n.) The color of an orange; reddish yellow.

Orangeade (n.) A drink made of orange juice and water, corresponding to lemonade; orange sherbet.

Orangeat (n.) Candied orange peel; also, orangeade.

Orangeism (n.) Attachment to the principles of the society of Orangemen; the tenets or practices of the Orangemen.

Orangeman (n.) One of a secret society, organized in the north of Ireland in 1795, the professed objects of which are the defense of the regning sovereign of Great Britain, the support of the Protestant religion, the maintenance of the laws of the kingdom, etc.; -- so called in honor of William, Prince of Orange, who became William III. of England.

Orangeroot (n.) An American ranunculaceous plant (Hidrastis Canadensis), having a yellow tuberous root; -- also called yellowroot, golden seal, etc.

Orangery (n.) A place for raising oranges; a plantation of orange trees.

Orang-outang (n.) An arboreal anthropoid ape (Simia satyrus), which inhabits Borneo and Sumatra. Often called simply orang.

Oration (n.) An elaborate discourse, delivered in public, treating an important subject in a formal and dignified manner; especially, a discourse having reference to some special occasion, as a funeral, an anniversary, a celebration, or the like; -- distinguished from an argument in court, a popular harangue, a sermon, a lecture, etc.; as, Webster's oration at Bunker Hill.

Orator (n.) A public speaker; one who delivers an oration; especially, one distinguished for his skill and power as a public speaker; one who is eloquent.

Orator (n.) In equity proceedings, one who prays for relief; a petitioner.

Orator (n.) A plaintiff, or complainant, in a bill in chancery.

Orator (n.) An officer who is the voice of the university upon all public occasions, who writes, reads, and records all letters of a public nature, presents, with an appropriate address, those persons on whom honorary degrees are to be conferred, and performs other like duties; -- called also public orator.

Oratorian (n.) See Fathers of the Oratory, under Oratory.

Oratorio (n.) A more or less dramatic text or poem, founded on some Scripture nerrative, or great divine event, elaborately set to music, in recitative, arias, grand choruses, etc., to be sung with an orchestral accompaniment, but without action, scenery, or costume, although the oratorio grew out of the Mysteries and the Miracle and Passion plays, which were acted.

Oratorio (n.) Performance or rendering of such a composition.

Oratory (n.) A place of orisons, or prayer; especially, a chapel or small room set apart for private devotions.

Oratory (n.) The art of an orator; the art of public speaking in an eloquent or effective manner; the exercise of rhetorical skill in oral discourse; eloquence.

Oratress (n.) A woman who makes public addresses.

Oratrix (n.) A woman plaintiff, or complainant, in equity pleading.

Orb (n.) A blank window or panel.

Orb (n.) A spherical body; a globe; especially, one of the celestial spheres; a sun, planet, or star.

Orb (n.) One of the azure transparent spheres conceived by the ancients to be inclosed one within another, and to carry the heavenly bodies in their revolutions.

Orb (n.) A circle; esp., a circle, or nearly circular orbit, described by the revolution of a heavenly body; an orbit.

Orb (n.) A period of time marked off by the revolution of a heavenly body.

Orb (n.) The eye, as luminous and spherical.

Orb (n.) A revolving circular body; a wheel.

Orb (n.) A sphere of action.

Orb (n.) Same as Mound, a ball or globe. See lst Mound.

Orb (n.) A body of soldiers drawn up in a circle, as for defense, esp. infantry to repel cavalry.

Orbation (n.) The state of being orbate, or deprived of parents or children; privation, in general; bereavement.

Orbicle (n.) A small orb, or sphere.

Orbicula (n.) Same as Discina.

Orbiculate (n.) That which is orbiculate; especially, a solid the vertical section of which is oval, and the horizontal section circular.

Orbiculation (n.) The state or quality of being orbiculate; orbicularness.

Orbit (n.) The path described by a heavenly body in its periodical revolution around another body; as, the orbit of Jupiter, of the earth, of the moon.

Orbit (n.) An orb or ball.

Orbit (n.) The cavity or socket of the skull in which the eye and its appendages are situated.

Orbit (n.) The skin which surrounds the eye of a bird.

Orbitolites (n.) A genus of living Foraminifera, forming broad, thin, circular disks, containing numerous small chambers.

Orbitosphenoid (n.) The orbitosphenoid bone, which is situated in the orbit on either side of the presphenoid. It generally forms a part of the sphenoid in the adult.

Orbitude (n.) Alt. of Orbity

Orbity (n.) Orbation.

Orbulina (n.) A genus of minute living Foraminifera having a globular shell.

Orc (n.) The grampus.

Orcein (n.) A reddish brown amorphous dyestuff, /, obtained from orcin, and forming the essential coloring matter of cudbear and archil. It is closely related to litmus.

Orchal (n.) See Archil.

Orchanet (n.) Same as Alkanet, 2.

Orchard (n.) A garden.

Orchard (n.) An inclosure containing fruit trees; also, the fruit trees, collectively; -- used especially of apples, peaches, pears, cherries, plums, or the like, less frequently of nutbearing trees and of sugar maple trees.

Orcharding (n.) The cultivation of orchards.

Orcharding (n.) Orchards, in general.

Orchardist (n.) One who cultivates an orchard.

Orchel (n.) Archil.

Orchesography (n.) A treatise upon dancing.

Orchester (n.) See Orchestra.

Orchestian (n.) Any species of amphipod crustacean of the genus Orchestia, or family Orchestidae. See Beach flea, under Beach.

Orchestra (n.) The space in a theater between the stage and the audience; -- originally appropriated by the Greeks to the chorus and its evolutions, afterward by the Romans to persons of distinction, and by the moderns to a band of instrumental musicians.

Orchestra (n.) The place in any public hall appropriated to a band of instrumental musicians.

Orchestra (n.) Loosely: A band of instrumental musicians performing in a theater, concert hall, or other place of public amusement.

Orchestra (n.) Strictly: A band suitable for the performance of symphonies, overtures, etc., as well as for the accompaniment of operas, oratorios, cantatas, masses, and the like, or of vocal and instrumental solos.

Orchestra (n.) A band composed, for the largest part, of players of the various viol instruments, many of each kind, together with a proper complement of wind instruments of wood and brass; -- as distinguished from a military or street band of players on wind instruments, and from an assemblage of solo players for the rendering of concerted pieces, such as septets, octets, and the like.

Orchestra (n.) The instruments employed by a full band, collectively; as, an orchestra of forty stringed instruments, with proper complement of wind instruments.

Orchestration (n.) The arrangement of music for an orchestra; orchestral treatment of a composition; -- called also instrumentation.

Orchestre (n.) See Orchestra.

Orchestrion (n.) A large music box imitating a variety of orchestral instruments.

Orchid (n.) Any plant of the order Orchidaceae. See Orchidaceous.

Orchidologist (n.) One versed in orchidology.

Orchidology (n.) The branch of botany which treats of orchids.

Orchil (n.) See Archil.

Orchis (n.) A genus of endogenous plants growing in the North Temperate zone, and consisting of about eighty species. They are perennial herbs growing from a tuber (beside which is usually found the last year's tuber also), and are valued for their showy flowers. See Orchidaceous.

Orchis (n.) Any plant of the same family with the orchis; an orchid.

Orchitis (n.) Inflammation of the testicles.

Orchotomy (n.) The operation of cutting out or removing a testicle by the knife; castration.

Orcin (n.) A colorless crystal

Ord (n.) An edge or point; also, a beginning.

Ordainer (n.) One who ordains.

Ordainment (n.) Ordination.

Ordal (n.) Ordeal.

Ordeal (n.) An ancient form of test to determine guilt or innocence, by appealing to a supernatural decision, -- once common in Europe, and still practiced in the East and by savage tribes.

Ordeal (n.) Any severe trial, or test; a painful experience.

Order (n.) Regular arrangement; any methodical or established succession or harmonious relation; method; system

Order (n.) Of material things, like the books in a library.

Order (n.) Of intellectual notions or ideas, like the topics of a discource.

Order (n.) Of periods of time or occurrences, and the like.

Order (n.) Right arrangement; a normal, correct, or fit condition; as, the house is in order; the machinery is out of order.

Order (n.) The customary mode of procedure; established system, as in the conduct of debates or the transaction of business; usage; custom; fashion.

Order (n.) Conformity with law or decorum; freedom from disturbance; general tranquillity; public quiet; as, to preserve order in a community or an assembly.

Order (n.) That which prescribes a method of procedure; a rule or regulation made by competent authority; as, the rules and orders of the senate.

Order (n.) A command; a mandate; a precept; a direction.

Order (n.) Hence: A commission to purchase, sell, or supply goods; a direction, in writing, to pay money, to furnish supplies, to admit to a building, a place of entertainment, or the like; as, orders for blankets are large.

Order (n.) A number of things or persons arranged in a fixed or suitable place, or relative position; a rank; a row; a grade; especially, a rank or class in society; a group or division of men in the same social or other position; also, a distinct character, kind, or sort; as, the higher or lower orders of society; talent of a high order.

Order (n.) A body of persons having some common honorary distinction or rule of obligation; esp., a body of religious persons or aggregate of convents living under a common rule; as, the Order of the Bath; the Franciscan order.

Order (n.) An ecclesiastical grade or rank, as of deacon, priest, or bishop; the office of the Christian ministry; -- often used in the plural; as, to take orders, or to take holy orders, that is, to enter some grade of the ministry.

Order (n.) The disposition of a column and its component parts, and of the entablature resting upon it, in classical architecture; hence (as the column and entablature are the characteristic features of classical architecture) a style or manner of architectural designing.

Order (n.) An assemblage of genera having certain important characters in common; as, the Carnivora and Insectivora are orders of Mammalia.

Order (n.) The placing of words and members in a sentence in such a manner as to contribute to force and beauty or clearness of expression.

Order (n.) Rank; degree; thus, the order of a curve or surface is the same as the degree of its equation.

Order (n.) To put in order; to reduce to a methodical arrangement; to arrange in a series, or with reference to an end. Hence, to regulate; to dispose; to direct; to rule.

Order (n.) To give an order to; to command; as, to order troops to advance.

Order (n.) To give an order for; to secure by an order; as, to order a carriage; to order groceries.

Order (n.) To admit to holy orders; to ordain; to receive into the ranks of the ministry.

Orderer (n.) One who puts in order, arranges, methodizes, or regulates.

Orderer (n.) One who gives orders.

Ordering (n.) Disposition; distribution; management.

Order

Orderly (n.) A noncommissioned officer or soldier who attends a superior officer to carry his orders, or to render other service.

Orderly (n.) A street sweeper.

Ordinability (n.) Capability of being ordained or appointed.

Ordinal (n.) A word or number denoting order or succession.

Ordinal (n.) The book of forms for making, ordaining, and consecrating bishops, priests, and deacons.

Ordinal (n.) A book containing the rubrics of the Mass.

Ordinalism (n.) The state or quality of being ordinal.

Ordinance (n.) Orderly arrangement; preparation; provision.

Ordinance (n.) A rule established by authority; a permanent rule of action; a statute, law, regulation, rescript, or accepted usage; an edict or decree; esp., a local law enacted by a municipal government; as, a municipal ordinance.

Ordinance (n.) An established rite or ceremony.

Ordinance (n.) Rank; order; station.

Ordinance (n.) Ordnance; cannon.

Ordinand (n.) One about to be ordained.

Ordinant (n.) One who ordains.

Ordinary (n.) An officer who has original jurisdiction in his own right, and not by deputation.

Ordinary (n.) One who has immediate jurisdiction in matters ecclesiastical; an ecclesiastical judge; also, a deputy of the bishop, or a clergyman appointed to perform divine service for condemned criminals and assist in preparing them for death.

Ordinary (n.) A judicial officer, having generally the powers of a judge of probate or a surrogate.

Ordinary (n.) The mass; the common run.

Ordinary (n.) That which is so common, or continued, as to be considered a settled establishment or institution.

Ordinary (n.) Anything which is in ordinary or common use.

Ordinary (n.) A dining room or eating house where a meal is prepared for all comers, at a fixed price for the meal, in distinction from one where each dish is separately charged; a table d'hote; hence, also, the meal furnished at such a dining room.

Ordinary (n.) A charge or bearing of simple form, one of nine or ten which are in constant use. The bend, chevron, chief, cross, fesse, pale, and saltire are uniformly admitted as ordinaries. Some authorities include bar, bend sinister, pile, and others. See Subordinary.

Ordinaryship (n.) The state of being an ordinary.

Ordinate (n.) The distance of any point in a curve or a straight

Ordination (n.) The act of ordaining, appointing, or setting apart; the state of being ordained, appointed, etc.

Ordination (n.) The act of setting apart to an office in the Christian ministry; the conferring of holy orders.

Ordination (n.) Disposition; arrangement; order.

Ordinator (n.) One who ordains or establishes; a director.

Ordnance (n.) Heavy weapons of warfare; cannon, or great guns, mortars, and howitzers; artillery; sometimes, a general term for all weapons and appliances used in war.

Ordonnance (n.) The disposition of the parts of any composition with regard to one another and the whole.

Ordovician (n.) The Ordovician formation.

Ordure (n.) Dung; excrement; faeces.

Ordure (n.) Defect; imperfection; fault.

Ore (n.) Honor; grace; favor; mercy; clemency; happy augry.

Ore (n.) The native form of a metal, whether free and uncombined, as gold, copper, etc., or combined, as iron, lead, etc. Usually the ores contain the metals combined with oxygen, sulphur, arsenic, etc. (called mineralizers).

Ore (n.) A native metal or its compound with the rock in which it occurs, after it has been picked over to throw out what is worthless.

Ore (n.) Metal; as, the liquid ore.

Oread (n.) One of the nymphs of mountains and grottoes.

Oreide (n.) See Oroide.

Oreodon (n.) A genus of extinct herbivorous mammals, abundant in the Tertiary formation of the Rocky Mountains. It is more or less related to the camel, hog, and deer.

Oreography (n.) The science of mountains; orography.

Oreoselin (n.) A white crystal

Oreweed (n.) Same as Oarweed.

Orewood (n.) Same as Oarweed.

Orf (n.) Alt. of Orfe

Orfe (n.) A bright-colored domesticated variety of the id. See Id.

Orfgild (n.) Restitution for cattle; a penalty for taking away cattle.

Orfray (n.) The osprey.

Orfrays (n.) See Orphrey. [Obs.] Rom. of R.

Orgal (n.) See Argol.

Organ (n.) An instrument or medium by which some important action is performed, or an important end accomplished; as, legislatures, courts, armies, taxgatherers, etc., are organs of government.

Organ (n.) A natural part or structure in an animal or a plant, capable of performing some special action (termed its function), which is essential to the life or well-being of the whole; as, the heart, lungs, etc., are organs of animals; the root, stem, foliage, etc., are organs of plants.

Organ (n.) A component part performing an essential office in the working of any complex machine; as, the cylinder, valves, crank, etc., are organs of the steam engine.

Organ (n.) A medium of communication between one person or body and another; as, the secretary of state is the organ of communication between the government and a foreign power; a newspaper is the organ of its editor, or of a party, sect, etc.

Organ (n.) A wind instrument containing numerous pipes of various dimensions and kinds, which are filled with wind from a bellows, and played upon by means of keys similar to those of a piano, and sometimes by foot keys or pedals; -- formerly used in the plural, each pipe being considired an organ.

Organdie (n.) Alt. of Organdy

Organdy (n.) A kind of transparent light muslin.

Organicalness (n.) The quality or state of being organic.

Organicism (n.) The doctrine of the localization of disease, or which refers it always to a material lesion of an organ.

Organism (n.) Organic structure; organization.

Organism (n.) An organized being; a living body, either vegetable or animal, compozed of different organs or parts with functions which are separate, but mutually dependent, and essential to the life of the individual.

Organist (n.) One who plays on the organ.

Organist (n.) One of the priests who organized or sung in parts.

Organista (n.) Any one of several South American wrens, noted for the sweetness of their song.

Organity (n.) Organism.

Organizability (n.) Quality of being organizable; capability of being organized.

Organization (n.) The act of organizing; the act of arranging in a systematic way for use or action; as, the organization of an army, or of a deliberative body.

Organization (n.) The state of being organized; also, the relations included in such a state or condition.

Organization (n.) That which is organized; an organized existence; an organism

Organization (n.) an arrangement of parts for the performance of the functions necessary to life.

Organizer (n.) One who organizes.

Organling (n.) A large kind of sea fish; the orgeis.

Organogen (n.) A name given to any one of the four elements, carbon, hydrogen, oxygen, and nitrogen, which are especially characteristic ingredients of organic compounds; also, by extension, to other elements sometimes found in the same connection; as sulphur, phosphorus, etc.

Organogenesis (n.) The origin and development of organs in animals and plants.

Organogenesis (n.) The germ history of the organs and systems of organs, -- a branch of morphogeny.

Organogeny (n.) Organogenesis.

Organographist (n.) One versed in organography.

Organography (n.) A description of the organs of animals or plants.

Organology (n.) The science of organs or of anything considered as an organic structure.

Organology (n.) That branch of biology which treats, in particular, of the organs of animals and plants. See Morphology.

Organon (n.) Alt. of Organum

Organum (n.) An organ or instrument; hence, a method by which philosophical or scientific investigation may be conducted; -- a term adopted from the Aristotelian writers by Lord Bacon, as the title ("Novum Organon") of part of his treatise on philosophical method.

Organonymy (n.) The designation or nomenclature of organs.

Organophyly (n.) The tribal history of organs, -- a branch of morphophyly.

Organoscopy (n.) Phrenology.

Organule (n.) One of the essential cells or elements of an organ. See Sense organule, under Sense.

Organy (n.) See Origan.

Organzine (n.) A kind of double thrown silk of very fine texture, that is, silk twisted like a rope with different strands, so as to increase its strength.

Orgasm (n.) Eager or immoderate excitement or action; the state of turgescence of any organ; erethism; esp., the height of venereal excitement in sexual intercourse.

Orgeat (n.) A sirup in which, formerly, a decoction of barley entered, but which is now prepared with an emulsion of almonds, -- used to flavor beverages or edibles.

Orgeis (n.) See Organling.

Orgue (n.) Any one of a number of long, thick pieces of timber, pointed and shod with iron, and suspended, each by a separate rope, over a gateway, to be let down in case of attack.

Orgue (n.) A piece of ordnance, consisting of a number of musket barrels arranged so that a match or train may connect with all their touchholes, and a discharge be secured almost or quite simultaneously.

Orgy (n.) A frantic revel; drunken revelry. See Orgies

Orgyia (n.) A genus of bombycid moths whose caterpillars (esp. those of Orgyia leucostigma) are often very injurious to fruit trees and shade trees. The female is wingless. Called also vaporer moth.

Oricalche (n.) See Orichalch.

Orichalch (n.) A metallic substance, resembling gold in color, but inferior in value; a mixed metal of the ancients, resembling brass; -- called also aurichalcum, orichalcum, etc.

Oriel (n.) A gallery for minstrels.

Oriel (n.) A small apartment next a hall, where certain persons were accustomed to dine; a sort of recess.

Oriel (n.) A bay window. See Bay window.

Oriency (n.) Brightness or strength of color.

Orient (n.) The part of the horizon where the sun first appears in the morning; the east.

Orient (n.) The countries of Asia or the East.

Orient (n.) A pearl of great luster.

Oriental (n.) A native or inhabitant of the Orient or some Eastern part of the world; an Asiatic.

Oriental (n.) Eastern Christians of the Greek rite.

Orientalism (n.) Any system, doctrine, custom, expression, etc., peculiar to Oriental people.

Orientalism (n.) Knowledge or use of Oriental languages, history, literature, etc.

Orientalist (n.) An inhabitant of the Eastern parts of the world; an Oriental.

Orientalist (n.) One versed in Eastern languages, literature, etc.; as, the Paris Congress of Orientalists.

Orientality (n.) The quality or state of being oriental or eastern.

Orientation (n.) The act or process of orientating; determination of the points of the compass, or the east point, in taking bearings.

Orientation (n.) The tendency of a revolving body, when suspended in a certain way, to bring the axis of rotation into parallelism with the earth's axis.

Orientation (n.) An aspect or fronting to the east; especially (Arch.), the placing of a church so that the chancel, containing the altar toward which the congregation fronts in worship, will be on the east end.

Orientation (n.) Fig.: A return to first principles; an orderly arrangement.

Orientness (n.) The quality or state of being orient or bright; splendor.

Orifice (n.) A mouth or aperture, as of a tube, pipe, etc.; an opening; as, the orifice of an artery or vein; the orifice of a wound.

Oriflamb (n.) Alt. of Oriflamme

Oriflamme (n.) The ancient royal standard of France.

Oriflamme (n.) A standard or ensign, in battle.

Origan (n.) Alt. of Origanum

Origanum (n.) A genus of aromatic labiate plants, including the sweet marjoram (O. Marjorana) and the wild marjoram (O. vulgare).

Origenism (n.) The opinions of Origen of Alexandria, who lived in the 3d century, one of the most learned of the Greek Fathers. Prominent in his teaching was the doctrine that all created beings, including Satan, will ultimately be saved.

Origenist (n.) A follower of Origen of Alexandria.

Origin (n.) The first existence or beginning of anything; the birth.

Origin (n.) That from which anything primarily proceeds; the fountain; the spring; the cause; the occasion.

Origin (n.) The point of attachment or end of a muscle which is fixed during contraction; -- in contradistinction to insertion.

Original (n.) Origin; commencement; source.

Original (n.) That which precedes all others of its class; archetype; first copy; hence, an original work of art, manuscript, text, and the like, as distinguished from a copy, translation, etc.

Original (n.) An original thinker or writer; an originator.

Original (n.) A person of marked eccentricity.

Original (n.) The natural or wild species from which a domesticated or cultivated variety has been derived; as, the wolf is thought by some to be the original of the dog, the blackthorn the original of the plum.

Originalist (n.) One who is original.

Originality (n.) The quality or state of being original.

Originalness (n.) The quality of being original; originality.

Origination (n.) The act or process of bringing or coming into existence; first production.

Origination (n.) Mode of production, or bringing into being.

Originator (n.) One who originates.

Orillon (n.) A semicircular projection made at the shoulder of a bastion for the purpose of covering the retired flank, -- found in old fortresses.

Oriol (n.) See Oriel.

Oriole (n.) Any one of various species of Old World singing birds of the family Oriolidae. They are usually conspicuously colored with yellow and black. The European or golden oriole (Oriolus galbula, or O. oriolus) has a very musical flutelike note.

Oriole (n.) In America, any one of several species of the genus Icterus, belonging to the family Icteridae. See Baltimore oriole, and Orchard oriole, under Orchard.

Orion (n.) A large and bright constellation on the equator, between the stars Aldebaran and Sirius. It contains a remarkable nebula visible to the naked eye.

Orismology (n.) That departament of natural history which treats of technical terms.

Orison (n.) A prayer; a supplication.

Orisont (n.) Horizon.

Ork (n.) See Orc.

Orle (n.) A bearing, in the form of a fillet, round the shield, within, but at some distance from, the border.

Orle (n.) The wreath, or chaplet, surmounting or encircling the helmet of a knight and bearing the crest.

Orleans (n.) A cloth made of worsted and cotton, -- used for wearing apparel.

Orleans (n.) A variety of the plum. See under Plum.

Orlo (n.) A wind instrument of music in use among the Spaniards.

Orlop (n.) The lowest deck of a vessel, esp. of a ship of war, consisting of a platform laid over the beams in the hold, on which the cables are coiled.

Ormer (n.) An abalone.

Ormolu (n.) A variety of brass made to resemble gold by the use of less zinc and more copper in its composition than ordinary brass contains. Its golden color is often heightened by means of lacquer of some sort, or by use of acids. Called also mosaic gold.

Ormuzd (n.) The good principle, or being, of the ancient Persian religion. See Ahriman.

Ornament (n.) That which embellishes or adorns; that which adds grace or beauty; embellishment; decoration; adornment.

Ornamentation (n.) The act or art of ornamenting, or the state of being ornamented.

Ornamentation (n.) That which ornaments; ornament.

Ornamenter (n.) One who ornaments; a decorator.

Ornateness (n.) The quality of being ornate.

Ornature (n.) Decoration; ornamentation.

Ornithichnite (n.) The footmark of a bird occurring in strata of stone.

Ornithichnology (n.) The branch of science which treats of ornithichnites.

Ornithoidichnite (n.) A fossil track resembling that of a bird.

Ornitholite (n.) The fossil remains of a bird.

Ornitholite (n.) A stone of various colors bearing the figures of birds.

Ornithologist (n.) One skilled in ornithology; a student of ornithology; one who describes birds.

Ornithology (n.) That branch of zoology which treats of the natural history of birds and their classification.

Ornithology (n.) A treatise or book on this science.

Ornithomancy (n.) Divination by means of birds, their flight, etc.

Ornithon (n.) An aviary; a poultry house.

Ornithorhynchus (n.) See Duck mole, under Duck.

Ornithoscopy (n.) Observation of birds and their habits.

Ornithotomist (n.) One who is skilled in ornithotomy.

Ornithotomy (n.) The anatomy or dissection of birds.

Orography (n.) That branch of science which treats of mountains and mountain systems; orology; as, the orography of Western Europe.

Orohippus (n.) A genus of American Eocene mammals allied to the horse, but having four toes in front and three behind.

Oroide (n.) An alloy, chiefly of copper and zinc or tin, resembling gold in color and brilliancy.

Orologist (n.) One versed in orology.

Orology (n.) The science or description of mountains.

Orotund (n.) The orotund voice or utterance

Orotundity (n.) The orotund mode of intonation.

Orpha

Orphan (n.) A child bereaved of both father and mother; sometimes, also, a child who has but one parent living.

Orphanage (n.) The state of being an orphan; orphanhood; orphans, collectively.

Orphanage (n.) An institution or asylum for the care of orphans.

Orphancy (n.) Orphanhood.

Orphanet (n.) A little orphan.

Orphanhood (n.) The state or condition of being an orphan; orphanage.

Orphanism (n.) Orphanhood.

Orphanotrophism (n.) The care and support of orphans.

Orphanotrophy (n.) A hospital for orphans.

Orphanotrophy (n.) The act of supporting orphans.

Orpharion (n.) An old instrument of the lute or cittern kind.

Orphe

Orpheus (n.) The famous mythic Thracian poet, son of the Muse Calliope, and husband of Eurydice. He is reputed to have had power to entrance beasts and inanimate objects by the music of his lyre.

Orphrey (n.) A band of rich embroidery, wholly or in part of gold, affixed to vestments, especially those of ecclesiastics.

Orpiment (n.) Arsenic sesquisulphide, produced artificially as an amorphous lemonyellow powder, and occurring naturally as a yellow crystal

Orpin (n.) A yellow pigment of various degrees of intensity, approaching also to red.

Orpin (n.) The orpine.

Orpine (n.) A low plant with fleshy leaves (Sedum telephium), having clusters of purple flowers. It is found on dry, sandy places, and on old walls, in England, and has become naturalized in America. Called also stonecrop, and live-forever.

Orrach (n.) See Orach.

Orrery (n.) An apparatus which illustrates, by the revolution of balls moved by wheelwork, the relative size, periodic motions, positions, orbits, etc., of bodies in the solar system.

Orris (n.) A plant of the genus Iris (I. Florentina); a kind of flower-de-luce. Its rootstock has an odor resembling that of violets.

Orris (n.) A sort of gold or silver lace.

Orris (n.) A peculiar pattern in which gold lace or silver lace is worked; especially, one in which the edges are ornamented with conical figures placed at equal distances, with spots between them.

Orsedew (n.) Alt. of Orsedue

Orsedue (n.) Leaf metal of bronze; Dutch metal. See under Dutch.

Orseille (n.) See Archil.

Ort (n.) A morsel left at a meal; a fragment; refuse; -- commonly used in the plural.

Ortalidian (n.) Any one of numerous small two-winged flies of the family Ortalidae. The larvae of many of these flies live in fruit; those of others produce galls on various plants.

Orthid (n.) A brachiopod shell of the genus Orthis, and allied genera, of the family Orthidae.

Orthis (n.) An extinct genus of Brachiopoda, abundant in the Paleozoic rocks.

Orthite (n.) A variety of allanite occurring in slender prismatic crystals.

Orthocenter (n.) That point in which the three perpendiculars let fall from the angles of a triangle upon the opposite sides, or the sides produced, mutually intersect.

Orthoceras (n.) An extinct genus of Paleozoic Cephalopoda, having a long, straight, conical shell. The interior is divided into numerous chambers by transverse septa.

Orthoceratite (n.) An orthoceras; also, any fossil shell allied to Orthoceras.

Orthoclase (n.) Common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other. See Feldspar.

Orthodiagonal (n.) The diagonal or lateral axis in a monoclinic crystal which is at right angles with the vertical axis.

Orthodome (n.) See the Note under Dome, 4.

Orthodoxality (n.) Orthodoxness.

Orthodoxness (n.) The quality or state of being orthodox; orthodoxy.

Orthodoxy (n.) Soundness of faith; a belief in the doctrines taught in the Scriptures, or in some established standard of faith; -- opposed to heterodoxy or to heresy.

Orthodoxy (n.) Consonance to genuine Scriptural doctrines; -- said of moral doctrines and beliefs; as, the orthodoxy of a creed.

Orthodoxy (n.) By extension, said of any correct doctrine or belief.

Orthodromics (n.) The art of sailing in a direct course, or on the arc of a great circle, which is the shortest distance between any two points on the surface of the globe; great-circle sailing; orthodromy.

Orthodromy (n.) The act or art of sailing on a great circle.

Orthoepist (n.) One who is skilled in orthoepy.

Orthoepy (n.) The art of uttering words correctly; a correct pronunciation of words; also, mode of pronunciation.

Orthogamy (n.) Direct fertilization in plants, as when the pollen fertilizing the ovules comes from the stamens of the same blossom; -- opposed to heterogamy.

Orthognathism (n.) The quality or state of being orthognathous.

Orthogon (n.) A rectangular figure.

Orthographer (n.) One versed in orthography; one who spells words correctly.

Orthographist (n.) One who spells words correctly; an orthographer.

Orthography (n.) The art or practice of writing words with the proper letters, according to standard usage; conventionally correct spelling; also, mode of spelling; as, his orthography is vicious.

Orthography (n.) The part of grammar which treats of the letters, and of the art of spelling words correctly.

Orthography (n.) A drawing in correct projection, especially an elevation or a vertical section.

Orthology (n.) The right description of things.

Orthometry (n.) The art or practice of constructing verses correctly; the laws of correct versification.

Orthopedist (n.) One who prevents, cures, or remedies deformities, esp. in children.

Orthopedy (n.) The art or practice of curing the deformities of children, or, by extension, any deformities of the human body.

Orthophony (n.) The art of correct articulation; voice training.

Orthopinacoid (n.) A name given to the two planes in the monoclinic system which are parallel to the vertical and orthodiagonal axes.

Orthopn/a (n.) Alt. of Orthopny

Orthopny (n.) Specifically, a morbid condition in which respiration can be performed only in an erect posture; by extension, any difficulty of breathing.

Orthopraxy (n.) The treatment of deformities in the human body by mechanical appliances.

Orthopteran (n.) One of the Orthoptera.

Orthoscope (n.) An instrument designed to show the condition of the superficial portions of the eye.

Orthostade (n.) A chiton, or loose, ungirded tunic, falling in straight folds.

Orthostichy (n.) A longitudinal rank, or row, of leaves along a stem.

Orthotomy (n.) The property of cutting at right angles.

Orthoxylene (n.) That variety of xylene in which the two methyl groups are in the ortho position; a colorless, liquid, combustible hydrocarbon resembling benzene.

Ortolan (n.) A European singing bird (Emberiza hortulana), about the size of the lark, with black wings. It is esteemed delicious food when fattened. Called also bunting.

Ortolan (n.) In England, the wheatear (Saxicola oenanthe).

Ortolan (n.) In America, the sora, or Carolina rail (Porzana Carolina). See Sora.

Ortygan (n.) One of several species of East Indian birds of the genera Ortygis and Hemipodius. They resemble quails, but lack the hind toe. See Turnix.

Orval (n.) A kind of sage (Salvia Horminum).

Orvet (n.) The blindworm.

Orvietan (n.) A kind of antidote for poisons; a counter poison formerly in vogue.

Oryal (n.) Alt. of Oryall

Oryall (n.) See Oriel.

Oryctere (n.) The aard-vark.

Orycterope (n.) Same as Oryctere.

Oryctognosy (n.) Mineralogy.

Oryctography (n.) Description of fossils.

Oryctologist (n.) One versed in oryctology.

Oryctology (n.) An old name for paleontology.

Oryctology (n.) An old name for mineralogy and geology.

Oryx (n.) A genus of African antelopes which includes the gemsbok, the leucoryx, the bisa antelope (O. beisa), and the beatrix antelope (O. beatrix) of Arabia.

Oryza (n.) A genus of grasses including the rice plant; rice.

Os (n.) A bone.

Os (n.) A mouth; an opening; an entrance.

Os (n.) One of the ridges of sand or gravel found in Sweden, etc., supposed by some to be of marine origin, but probably formed by subglacial waters. The osar are similar to the kames of Scotland and the eschars of Ireland. See Eschar.

Osanne (n.) Hosanna.

Oscan (n.) The language of the Osci.

Oscillancy (n.) The state of oscillating; a seesaw kind of motion.

Oscillaria (n.) A genus of dark green, or purplish black, filamentous, fresh-water algae, the threads of which have an automatic swaying or crawling motion. Called also Oscillatoria.

Oscillation (n.) The act of oscillating; a swinging or moving backward and forward, like a pendulum; vibration.

Oscillation (n.) Fluctuation; variation; change back and forth.

Oscinian (n.) One of the Oscines, or singing birds.

Oscinian (n.) Any one of numerous species of dipterous files of the family Oscinidae.

Oscitancy (n.) The act of gaping or yawning.

Oscitancy (n.) Drowsiness; dullness; sluggishness.

Oscitation (n.) The act of yawning or gaping.

Osculation (n.) The act of kissing; a kiss.

Osculation (n.) The contact of one curve with another, when the number of consecutive points of the latter through which the former passes suffices for the complete determination of the former curve.

Osculatory (n.) Same as Pax, 2.

Osculatrix (n.) A curve whose contact with a given curve, at a given point, is of a higher order (or involves the equality of a greater number of successive differential coefficients of the ordinates of the curves taken at that point) than that of any other curve of the same kind.

Oscule (n.) One of the excurrent apertures of sponges.

Osculum (n.) Same as Oscule.

Osier (n.) A kind of willow (Salix viminalis) growing in wet places in Europe and Asia, and introduced into North America. It is considered the best of the willows for basket work. The name is sometimes given to any kind of willow.

Osier (n.) One of the long, pliable twigs of this plant, or of other similar plants.

Osiery (n.) An osier bed.

Osiris (n.) One of the principal divinities of Egypt, the brother and husband of Isis. He was figured as a mummy wearing the royal cap of Upper Egypt, and was symbolized by the sacred bull, called Apis. Cf. Serapis.

Osmanli (n.) A Turkish official; one of the dominant tribe of Turks; loosely, any Turk.

Osmate (n.) A salt of osmic acid.

Osmaterium (n.) One of a pair of scent organs which the larvae of certain butterflies emit from the first body segment, either above or below.

Osmazome (n.) A substance formerly supposed to give to soup and broth their characteristic odor, and probably consisting of one or several of the class of nitrogenous substances which are called extractives.

Osmiamate (n.) A salt of osmiamic acid.

Osmidrosis (n.) The secretion of fetid sweat.

Osmite (n.) A salt of osmious acid.

Osmium (n.) A rare metallic element of the platinum group, found native as an alloy in platinum ore, and in iridosmine. It is a hard, infusible, bluish or grayish white metal, and the heaviest substance known. Its tetroxide is used in histological experiments to stain tissues. Symbol Os. Atomic weight 191.1. Specific gravity 22.477.

Osmometer (n.) An instrument for measuring the amount of osmotic action in different liquids.

Osmometry (n.) The study of osmose by means of the osmometer.

Osmose (n.) The tendency in fluids to mix, or become equably diffused, when in contact. It was first observed between fluids of differing densities, and as taking place through a membrane or an intervening porous structure. The more rapid flow from the thinner to the thicker fluid was then called endosmose, and the opposite, slower current, exosmose. Both are, however, results of the same force. Osmose may be regarded as a form of molecular attraction, allied to that of adhesion.

Osmose (n.) The action produced by this tendency.

Osmosis (n.) Osmose.

Osmund (n.) A fern of the genus Osmunda, or flowering fern. The most remarkable species is the osmund royal, or royal fern (Osmunda regalis), which grows in wet or boggy places, and has large bipinnate fronds, often with a panicle of capsules at the top. The rootstock contains much starch, and has been used in stiffening

Osnaburg (n.) A species of coarse

Oso-berry (n.) The small, blueblack, drupelike fruit of the Nuttallia cerasiformis, a shrub of Oregon and California, belonging to the Cherry tribe of Rosaceae.

Osphradium (n.) The olfactory organ of some Mollusca. It is connected with the organ of respiration.

Osprey (n.) Alt. of Ospray

Ospray (n.) The fishhawk.

Oss (n.) To prophesy; to presage.

Osse (n.) A prophetic or ominous utterance.

Ossean (n.) A fish having a bony skeleton; a teleost.

Ossein (n.) The organic basis of bone tissue; the residue after removal of the mineral matters from bone by dilute acid; in embryonic tissue, the substance in which the mineral salts are deposited to form bone; -- called also ostein. Chemically it is the same as collagen.

Osselet (n.) A little bone.

Osselet (n.) The internal bone, or shell, of a cuttlefish.

Osseter (n.) A species of sturgeon.

Ossicle (n.) A little bone; as, the auditory ossicles in the tympanum of the ear.

Ossicle (n.) One of numerous small calcareous structures forming the skeleton of certain echinoderms, as the starfishes.

Ossiculum (n.) Same as Ossicle.

Ossification (n.) The formation of bone; the process, in the growth of an animal, by which inorganic material (mainly lime salts) is deposited in cartilage or membrane, forming bony tissue; ostosis.

Ossification (n.) The state of being changed into a bony substance; also, a mass or point of ossified tissue.

Ossifrage (n.) The lammergeir.

Ossifrage (n.) The young of the sea eagle or bald eagle.

Osspringer (n.) The osprey.

Ossuarium (n.) A charnel house; an ossuary.

Ossuary (n.) A place where the bones of the dead are deposited; a charnel house.

Ost (n.) See Oast.

Ostein (n.) Ossein.

Osteitis (n.) Inflammation of bone.

Osteler (n.) Same as Hosteler.

Ostensibility (n.) The quality or state of being ostensible.

Ostension (n.) The showing of the sacrament on the altar in order that it may receive the adoration of the communicants.

Ostensorium (n.) Alt. of Ostensory

Ostensory (n.) Same as Monstrance.

Ostent (n.) Appearance; air; mien.

Ostent (n.) Manifestation; token; portent.

Ostentation (n.) The act of ostentating or of making an ambitious display; unnecessary show; pretentious parade; -- usually in a detractive sense.

Ostentation (n.) A show or spectacle.

Ostentator (n.) One fond of display; a boaster.

Osteoblast (n.) One of the protoplasmic cells which occur in the osteogenetic layer of the periosteum, and from or around which the matrix of the bone is developed; an osteoplast.

Osteoclasis (n.) The operation of breaking a bone in order to correct deformity.

Osteoclast (n.) A myeloplax.

Osteoclast (n.) An instrument for performing osteoclasis.

Osteocolla (n.) A kind of glue obtained from bones.

Osteocolla (n.) A cellular calc tufa, which in some places forms incrustations on the stems of plants, -- formerly supposed to have the quality of uniting fractured bones.

Osteocomma (n.) A metamere of the vertebrate skeleton; an osteomere; a vertebra.

Osteocope (n.) Pain in the bones; a violent fixed pain in any part of a bone.

Osteocranium (n.) The bony cranium, as distinguished from the cartilaginous cranium.

Osteodentine (n.) A hard substance, somewhat like bone, which is sometimes deposited within the pulp cavity of teeth.

Osteogen (n.) The soft tissue, or substance, which, in developing bone, ultimately undergoes ossification.

Osteogenesis (n.) Alt. of Osteogeny

Osteogeny (n.) The formation or growth of bone.

Osteographer (n.) An osteologist.

Osteography (n.) The description of bones; osteology.

Osteolite (n.) A massive impure apatite, or calcium phosphate.

Osteologer (n.) One versed in osteology; an osteologist.

Osteologist (n.) One who is skilled in osteology; an osteologer.

Osteology (n.) The science which treats of the bones of the vertebrate skeleton.

Osteoma (n.) A tumor composed mainly of bone; a tumor of a bone.

Osteomalacia (n.) A disease of the bones, in which they lose their earthy material, and become soft, flexible, and distorted. Also called malacia.

Osteomanty (n.) Divination by means of bones.

Osteomere (n.) An osteocomma.

Osteophone (n.) An instrument for transmission of auditory vibrations through the bones of the head, so as to be appreciated as sounds by persons deaf from causes other than those affecting the nervous apparatus of hearing.

Osteoplast (n.) An osteoblast.

Osteoplasty (n.) An operation or process by which the total or partial loss of a bone is remedied.

Osteosarcoma (n.) A tumor having the structure of a sacroma in which there is a deposit of bone; sarcoma connected with bone.

Osteotome (n.) Strong nippers or a chisel for dividing bone.

Osteotomist (n.) One skilled in osteotomy.

Osteotomy (n.) The dissection or anatomy of bones; osteology.

Osteotomy (n.) The operation of dividing a bone or of cutting a piece out of it, -- done to remedy deformity, etc.

Ostiary (n.) The mouth of a river; an estuary.

Ostiary (n.) One who keeps the door, especially the door of a church; a porter.

Ostiole (n.) The exterior opening of a stomate. See Stomate.

Ostiole (n.) Any small orifice.

Ostitis (n.) See Osteitis.

Ostium (n.) An opening; a passage.

Ostler (n.) See Hostler.

Ostleress (n.) A female ostler.

Ostlery (n.) See Hostelry.

Ostosis (n.) Bone formation; ossification. See Ectostosis, and Endostosis.

Ostracean (n.) Any one of a family of bivalves, of which the oyster is the type.

Ostracion (n.) A genus of plectognath fishes having the body covered with solid, immovable, bony plates. It includes the trunkfishes.

Ostraciont (n.) A fish of the genus Ostracion and allied genera.

Ostracism (n.) Banishment by popular vote, -- a means adopted at Athens to rid the city of a person whose talent and influence gave umbrage.

Ostracism (n.) Banishment; exclusion; as, social ostracism.

Ostracite (n.) A fossil oyster.

Ostracoid (n.) One of the Ostracoidea.

Ostrea (n.) A genus of bivalve Mollusca which includes the true oysters.

Ostreaculture (n.) The artificial cultivation of oysters.

Ostreophagist (n.) One who feeds on oysters.

Ostrich (n.) A large bird of the genus Struthio, of which Struthio camelus of Africa is the best known species. It has long and very strong legs, adapted for rapid running; only two toes; a long neck, nearly bare of feathers; and short wings incapable of flight. The adult male is about eight feet high.

Ostrogoth (n.) One of the Eastern Goths. See Goth.

Otacoustic (n.) Alt. of Otacousticon

Otacousticon (n.) An instrument to facilitate hearing, as an ear trumpet.

Otalgia (n.) Pain in the ear; earache.

Otalgic (n.) A remedy for otalgia.

Otalgy (n.) Pain in the ear; otalgia.

Otary (n.) Any eared seal.

Otheoscope (n.) An instrument for exhibiting the repulsive action produced by light or heat in an exhausted vessel; a modification of the radoimeter.

Otherness (n.) The quality or state of being other or different; alterity; oppositeness.

Otiosity (n.) Leisure; indolence; idleness; ease.

Otis (n.) A genus of birds including the bustards.

Otitis (n.) Inflammation of the ear.

Otoconite (n.) A mass of otoliths.

Otoconite (n.) An otolith.

Otocrane (n.) The cavity in the skull in which the parts of the internal ear are lodged.

Otocyst (n.) An auditory cyst or vesicle; one of the simple auditory organs of many invertebrates, containing a fluid and otoliths; also, the embryonic vesicle from which the parts of the internal ear of vertebrates are developed.

Otography (n.) A description of the ear.

Otolith (n.) Alt. of Otolite

Otolite (n.) One of the small bones or particles of calcareous or other hard substance in the internal ear of vertebrates, and in the auditory organs of many invertebrates; an ear stone. Collectively, the otoliths are called ear sand and otoconite.

Otologist (n.) One skilled in otology; an aurist.

Otology (n.) The branch of science which treats of the ear and its diseases.

Otopathy (n.) A diseased condition of the ear.

Otorrh/a (n.) A flow or running from the ear, esp. a purulent discharge.

Otoscope (n.) An instrument for examining the condition of the ear.

Otoscopy (n.) The examination of the ear; the art of using the otoscope.

Otosteal (n.) An auditory ossicle.

Otozoum (n.) An extinct genus of huge vertebrates, probably dinosaurs, known only from four-toed tracks in Triassic sandstones.

Ottar (n.) See Attar.

Otter (n.) Any carnivorous animal of the genus Lutra, and related genera. Several species are described. They have large, flattish heads, short ears, and webbed toes. They are aquatic, and feed on fish. Their fur is soft and valuable. The common otter of Europe is Lutra vulgaris; the American otter is L. Canadensis; other species inhabit South America and Asia.

Otter (n.) The larva of the ghost moth. It is very injurious to hop vines.

Otter (n.) A corruption of Annotto.

Otto (n.) See Attar.

Ottoman (n.) A Turk.

Ottoman (n.) A stuffed seat without a back, originally used in Turkey.

Ottomite (n.) An Ottoman.

Ottrelite (n.) A micaceous mineral occurring in small scales. It is characteristic of certain crystal

Ouakari (n.) Any South American monkey of the genus Brachyurus, especially B. ouakari.

Ouanderoo (n.) The wanderoo.

Ouarine (n.) A Brazilian monkey of the genus Mycetes.

Oubliette (n.) A dungeon with an opening only at the top, found in some old castles and other strongholds, into which persons condemned to perpetual imprisonment, or to perish secretly, were thrust, or lured to fall.

Ouch (n.) A socket or bezel holding a precious stone; hence, a jewel or ornament worn on the person.

Oughtness (n.) The state of being as a thing ought to be; rightness.

Ouistiti (n.) See Wistit.

Oul (n.) An awl.

Oul (n.) An owl.

Oulachan (n.) Same as Eulachon.

Ounce (n.) A weight, the sixteenth part of a pound avoirdupois, and containing 437/ grains.

Ounce (n.) The twelfth part of a troy pound.

Ounce (n.) Fig.: A small portion; a bit.

Ounce (n.) A fe

Ouphe (n.) A fairy; a goblin; an elf.

Ourang (n.) The orang-outang.

Ourang-outang (n.) See Orang-outang.

Ouranographist (n.) See Uranographist.

Ouranography (n.) See Uranography.

Ourebi (n.) A small, graceful, and swift African antelope, allied to the klipspringer.

Ourology (n.) See Urology.

Ouroscopy (n.) Ourology.

Ousel (n.) One of several species of European thrushes, especially the blackbird (Merula merula, or Turdus merula), and the mountain or ring ousel (Turdus torquatus).

Oust (n.) See Oast.

Ouster (n.) A putting out of possession; dispossession; ejection; disseizin.

Out (n.) One who, or that which, is out; especially, one who is out of office; -- generally in the plural.

Out (n.) A place or space outside of something; a nook or corner; an angle projecting outward; an open space; -- chiefly used in the phrase ins and outs; as, the ins and outs of a question. See under In.

Out (n.) A word or words omitted by the compositor in setting up copy; an omission.

Outbidder (n.) One who outbids.

Outbreak (n.) A bursting forth; eruption; insurrection.

Outbreaking (n.) The act of breaking out.

Outbreaking (n.) That which bursts forth.

Outbuilding (n.) A building separate from, and subordinate to, the main house; an outhouse.

Outburst (n.) A bursting forth.

Outcast (n.) One who is cast out or expelled; an exile; one driven from home, society, or country; hence, often, a degraded person; a vagabond.

Outcast (n.) A quarrel; a contention.

Outcasting (n.) That which is cast out.

Outcome (n.) That which comes out of, or follows from, something else; issue; result; consequence; upshot.

Outcourt (n.) An outer or exterior court.

Outcrier (n.) One who cries out or proclaims; a herald or crier.

Outcrop (n.) The coming out of a stratum to the surface of the ground.

Outcrop (n.) That part of inc

Outcry (n.) A vehement or loud cry; a cry of distress, alarm, opposition, or detestation; clamor.

Outcry (n.) Sale at public auction.

Outdweller (n.) One who holds land in a parish, but lives elsewhere.

Outer (n.) The part of a target which is beyond the circles surrounding the bull's-eye.

Outer (n.) A shot which strikes the outer of a target.

Outfall (n.) The mouth of a river; the lower end of a water course; the open end of a drain, culvert, etc., where the discharge occurs.

Outfall (n.) A quarrel; a falling out.

Outfield (n.) Arable land which has been or is being exhausted. See Infield, 1.

Outfield (n.) A field beyond, or separated from, the inclosed land about the homestead; an uninclosed or unexplored tract. Also used figuratively.

Outfield (n.) The part of the field beyond the diamond, or infield. It is occupied by the fielders.

Outfield (n.) The part of the field farthest from the batsman.

Outfit (n.) A fitting out, or equipment, as of a ship for a voyage, or of a person for an expedition in an unoccupied region or residence in a foreign land; things required for equipment; the expense of, or allowance made for, equipment, as by the government of the United States to a diplomatic agent going abroad.

Outfitter (n.) One who furnishes outfits for a voyage, a journey, or a business.

Outfling (n.) A gibe; a contemptuous remark.

Outflow (n.) A flowing out; efflux.

Outform (n.) External appearance.

Outgate (n.) An outlet.

Outgo (n.) That which goes out, or is paid out; outlay; expenditure; -- the opposite of income.

Outgoer (n.) One who goes out or departs.

Outgoing (n.) The act or the state of going out.

Outgoing (n.) That which goes out; outgo; outlay.

Outgoing (n.) The extreme limit; the place of ending.

Outground (n.) Ground situated at a distance from the house; outlying land.

Outgrowth (n.) That which grows out of, or proceeds from, anything; an excrescence; an offshoot; hence, a result or consequence.

Outguard (n.) A guard or small body of troops at a distance from the main body of an army, to watch for the approach of an enemy; hence, anything for defense placed at a distance from the thing to be defended.

Outgush (n.) A pouring out; an outburst.

Outhaul (n.) A rope used for hauling out a sail upon a spar; -- opposite of inhaul.

Outhess (n.) Outcry; alarm.

Outhouse (n.) A small house or building at a little distance from the main house; an outbuilding.

Outing (n.) The act of going out; an airing; an excursion; as, a summer outing.

Outing (n.) A feast given by an apprentice when he is out of his time.

Outjet (n.) That which jets out or projects from anything.

Outkeeper (n.) An attachment to a surveyor's compass for keeping tally in chaining.

Outlander (n.) A foreigner.

Outlaw (n.) A person excluded from the benefit of the law, or deprived of its protection.

Outlawry (n.) The act of outlawing; the putting a man out of the protection of law, or the process by which a man (as an absconding criminal) is deprived of that protection.

Outlawry (n.) The state of being an outlaw.

Outlay (n.) A laying out or expending.

Outlay (n.) That which is expended; expenditure.

Outlay (n.) An outlying haunt.

Outleap (n.) A sally.

Outlet (n.) The place or opening by which anything is let out; a passage out; an exit; a vent.

Outlier (n.) One who does not live where his office, or business, or estate, is.

Outlier (n.) That which lies, or is, away from the main body.

Outlier (n.) A part of a rock or stratum lying without, or beyond, the main body, from which it has been separated by denudation.

Outlimb (n.) An extreme member or part of a thing; a limb.

Out

Out

Out

Out

Outliver (n.) One who outlives.

Outlook (n.) The act of looking out; watch.

Outlook (n.) One who looks out; also, the place from which one looks out; a watchower.

Outlook (n.) The view obtained by one looking out; scope of vision; prospect; sight; appearance.

Outloose (n.) A loosing from; an escape; an outlet; an evasion.

Outlope (n.) An excursion.

Outness (n.) The state of being out or beyond; separateness.

Outness (n.) The state or quality of being distanguishable from the perceiving mind, by being in space, and possessing marerial quality; externality; objectivity.

Outparish (n.) A parish lying without the walls of, or in a remote part of, a town.

Outpart (n.) An outlying part.

Out-patient (n.) A patient who is outside a hospital, but receives medical aid from it.

Outport (n.) A harbor or port at some distance from the chief town or seat of trade.

Outpost (n.) A post or station without the limits of a camp, or at a distance from the main body of an army, for observation of the enemy.

Outpost (n.) The troops placed at such a station.

Outpour (n.) A flowing out; a free discharge.

Output (n.) The amount of coal or ore put out from one or more mines, or the quantity of material produced by, or turned out from, one or more furnaces or mills, in a given time.

Output (n.) That which is thrown out as products of the metabolic activity of the body; the egesta other than the faeces. See Income.

Outrage (n.) Injurious violence or wanton wrong done to persons or things; a gross violation of right or decency; excessive abuse; wanton mischief; gross injury.

Outrage (n.) Excess; luxury.

Outrage (n.) To commit outrage upon; to subject to outrage; to treat with violence or excessive abuse.

Outrage (n.) Specifically, to violate; to commit an indecent assault upon (a female).

Outrageous (n.) Of the nature of an outrage; exceeding the limits of right, reason, or decency; involving or doing an outrage; furious; violent; atrocious.

Outrance (n.) The utmost or last extremity.

Outrecuidance (n.) Excessive presumption.

Outride (n.) A riding out; an excursion.

Outride (n.) A place for riding out.

Outrider (n.) A summoner whose office is to cite men before the sheriff.

Outrider (n.) One who rides out on horseback.

Outrider (n.) A servant on horseback attending a carriage.

Outrigger (n.) Any spar or projecting timber run out for temporary use, as from a ship's mast, to hold a rope or a sail extended, or from a building, to support hoisting teckle.

Outrigger (n.) A projecting support for a rowlock, extended from the side of a boat.

Outrigger (n.) A boat thus equipped.

Outrigger (n.) A projecting contrivance at the side of a boat to prevent upsetting, as projecting spars with a log at the end.

Outroad (n.) Alt. of Outrode

Outrode (n.) An excursion.

Outroom (n.) An outer room.

Outrunner (n.) An offshoot; a branch.

Outscouring (n.) That which is scoured out o/ washed out.

Outsentry (n.) A sentry who guards the entrance or approach to a place; an outguard.

Outset (n.) A setting out, starting, or beginning.

Outsettler (n.) One who settles at a distance, or away, from others.

Outside (n.) The external part of a thing; the part, end, or side which forms the surface; that which appears, or is manifest; that which is superficial; the exterior.

Outside (n.) The part or space which lies without an inclosure; the outer side, as of a door, walk, or boundary.

Outside (n.) The furthest limit, as to number, quantity, extent, etc.; the utmost; as, it may last a week at the outside.

Outside (n.) One who, or that which, is without; hence, an outside passenger, as distinguished from one who is inside. See Inside, n. 3.

Outsider (n.) One not belonging to the concern, institution, party, etc., spoken of; one disconnected in interest or feeling.

Outsider (n.) A locksmith's pinchers for grasping the point of a key in the keyhole, to open a door from the outside when the key is inside.

Outsider (n.) A horse which is not a favorite in the betting.

Outskirt (n.) A part remote from the center; outer edge; border; -- usually in the plural; as, the outskirts of a town.

Outsole (n.) The outside sole of a boot or shoe.

Outspend (n.) Outlay; expenditure.

Outstreet (n.) A street remote from the center of a town.

Outterm (n.) An external or superficial thing; outward manner; superficial remark, etc.

Outwall (n.) The exterior wall; the outside surface, or appearance.

Outward (n.) External form; exterior.

Outway (n.) A way out; exit.

Outwit (n.) The faculty of acquiring wisdom by observation and experience, or the wisdom so acquired; -- opposed to inwit.

Outwork (n.) A minor defense constructed beyond the main body of a work, as a ravelin, lunette, hornwork, etc.

Ouvarovite (n.) Chrome garnet.

Ouzel (n.) Same as Ousel.

Oval (n.) A body or figure in the shape of an egg, or popularly, of an ellipse.

Ovalbumin (n.) Alt. of Ovalbumen

Ovalbumen (n.) The albumin from white of eggs; egg albumin; -- in distinction from serum albumin. See Albumin.

Ovariole (n.) One of the tubes of which the ovaries of most insects are composed.

Ovariotomist (n.) One who performs, or is skilled in, ovariotomy.

Ovariotomy (n.) The operation of removing one or both of the ovaries; oophorectomy.

Ovaritis (n.) Inflammation of the ovaries.

Ovarium (n.) An ovary. See Ovary.

Ovary (n.) That part of the pistil which contains the seed, and in most flowering plants develops into the fruit. See Illust. of Flower.

Ovary (n.) The essential female reproductive organ in which the ova are produced. See Illust. of Discophora.

Ovation (n.) A lesser kind of triumph allowed to a commander for an easy, bloodless victory, or a victory over slaves.

Ovation (n.) Hence: An expression of popular homage; the tribute of the multitude to a public favorite.

Oven (n.) A place arched over with brick or stonework, and used for baking, heating, or drying; hence, any structure, whether fixed or portable, which may be heated for baking, drying, etc.; esp., now, a chamber in a stove, used for baking or roasting.

Ovenbird (n.) Any species of the genus Furnarius, allied to the creepers. They inhabit South America and the West Indies, and construct curious oven-shaped nests.

Ovenbird (n.) In the United States, Seiurus aurocapillus; -- called also golden-crowned thrush.

Ovenbird (n.) In England, sometimes applied to the willow warbler, and to the long-tailed titmouse.

Over (n.) A certain number of balls (usually four) delivered successively from behind one wicket, after which the ball is bowled from behind the other wicket as many times, the fielders changing places.

Overaction (n.) Per/ormance to excess; exaggerated or excessive action.

Overanxiety (n.) The state of being overanxious; excessive anxiety.

Overbalance (n.) Excess of weight or value; something more than an equivalent; as, an overbalance of exports.

Overburden (n.) The waste which overlies good stone in a quarry.

Overcare (n.) Excessive care.

Overchange (n.) Too much or too frequent change; fickleness.

Overcharge (n.) An excessive load or burden.

Overcharge (n.) An excessive charge in an account.

Overcoat (n.) A coat worn over the other clothing; a greatcoat; a topcoat.

Overcomer (n.) One who overcomes.

Overconfidence (n.) Excessive confidence; too great reliance or trust.

Overdeal (n.) The excess.

Overdoer (n.) One who overdoes.

Overdose (n.) Too great a dose; an excessive dose.

Overestimate (n.) An estimate that is too high; as, an overestimate of the vote.

Overexcitement (n.) Excess of excitement; the state of being overexcited.

Overexertion (n.) Excessive exertion.

Overfall (n.) A cataract; a waterfall.

Overfall (n.) A turbulent surface of water, caused by strong currents setting over submerged ridges; also, a dangerous submerged ridge or shoal.

Overfatigue (n.) Excessive fatigue.

Overflow (n.) A flowing over, as of water or other fluid; an inundation.

Overflow (n.) That which flows over; a superfluous portion; a superabundance.

Overflow (n.) An outlet for the escape of surplus liquid.

Overflowing (n.) An overflow; that which overflows; exuberance; copiousness.

Overflux (n.) Overflow; exuberance.

Overforce (n.) Excessive force; violence.

Overfullness (n.) The state of being excessively or abnormally full, so as to cause overflow, distention, or congestion; excess of fullness; surfeit.

Over-garment (n.) An outer garment.

Overgreatness (n.) Excessive greatness.

Overgrowth (n.) Excessive growth.

Overhand (n.) The upper hand; advantage; superiority; mastery.

Overhang (n.) In a general sense, that which just out or projects; a projection; also, the measure of the projection; as, the overhang is five feet.

Overhang (n.) Specifically: The projection of an upper part (as a roof, an upper story, or other part) of a building beyond the lower part; as, the overhang of a roof, of the eaves, etc.

Overhang (n.) The portion of the bow or stem of a vessel that projects over the water beyond the water

Overhang (n.) The projection of a part beyond another part that is directly below it, or beyond a part by which it is supported; as, the overhang of a shaft; i. e., its projection beyond its bearing.

Overhaste (n.) Too great haste.

Overhaul (n.) Alt. of Overhauling

Overhauling (n.) A strict examination with a view to correction or repairs.

Overissue (n.) An excessive issue; an issue, as of notes or bonds, exceeding the limit of capital, credit, or authority.

Overjoy (n.) Excessive joy; transport.

Overking (n.) A king who has sovereignty over inferior kings or ruling princes.

Overlander (n.) One who travels over lands or countries; one who travels overland.

Overlap (n.) The lapping of one thing over another; as, an overlap of six inches; an overlap of a slate on a roof.

Overlap (n.) An extension of geological beds above and beyond others, as in a conformable series of beds, when the upper beds extend over a wider space than the lower, either in one or in all directions.

Overlargeness (n.) Excess of size or bulk.

Overlashing (n.) Excess; exaggeration.

Overlay (n.) A covering.

Overlay (n.) A piece of paper pasted upon the tympan sheet to improve the impression by making it stronger at a particular place.

Overlayer (n.) One who overlays; that with which anything is overlaid.

Overlaying (n.) A superficial covering; a coating.

Overleather (n.) Upper leather.

Overlight (n.) Too strong a light.

Over

Overlip (n.) The upper lip.

Overliver (n.) A survivor.

Overload (n.) An excessive load; the excess beyond a proper load.

Overlooker (n.) One who overlooks.

Overloop (n.) See Orlop.

Overlord (n.) One who is lord over another or others; a superior lord; a master.

Overlordship (n.) Lordship or supremacy of a person or a people over others.

Overmatch (n.) One superior in power; also, an unequal match; a contest in which one of the opponents is overmatched.

Overmeasure (n.) Excessive measure; the excess beyond true or proper measure; surplus.

Overmeddling (n.) Excessive interference.

Overmerit (n.) Excessive merit.

Overmoisture (n.) Excess of moisture.

Overmorrow (n.) The day after or following to-morrow.

Overmuch (n.) An excess; a surplus.

Overmuchness (n.) The quality or state of being in excess; superabundance.

Overnight (n.) The fore part of the night last past; the previous evening.

Overplus (n.) That which remains after a supply, or beyond a quantity proposed; surplus.

Overpoise (n.) Preponderant weight; a counterbalance.

Overpower (n.) A dominating power.

Overpraising (n.) The act of praising unduly; excessive praise.

Overpressure (n.) Excessive pressure or urging.

Overproduction (n.) Excessive production; supply beyond the demand.

Overquietness (n.) Too much quietness.

Overrate (n.) An excessive rate.

Overreach (n.) The act of striking the heel of the fore foot with the toe of the hind foot; -- said of horses.

Overreacher (n.) One who overreaches; one who cheats; a cheat.

Overrefinement (n.) Excessive refinement.

Overruler (n.) One who, or that which, controls, governs, or determines.

Overrunner (n.) One that overruns.

Overscrupulosity (n.) Overscrupulousness.

Overscrupulousness (n.) The quality or state of being overscrupulous; excess of scrupulousness.

Overseer (n.) One who oversees; a superintendent; a supervisor; as, an overseer of a mill; specifically, one or certain public officers; as, an overseer of the poor; an overseer of highways.

Overseership (n.) The office of an overseer.

Overset (n.) An upsetting; overturn; overthrow; as, the overset of a carriage.

Overset (n.) An excess; superfluity.

Overshadower (n.) One that throws a shade, or shadow, over anything.

Overshoe (n.) A shoe that is worn over another for protection from wet or for extra warmth; esp., an India-rubber shoe; a galoche.

Oversight (n.) Watchful care; superintendence; general supervision.

Oversight (n.) An overlooking; an omission; an error.

Oversight (n.) Escape from an overlooked peril.

Overskirt (n.) An upper skirt, shorter than the dress, and usually draped.

Overslaugh (n.) A bar in a river; as, the overslaugh in the Hudson River.

Overslop (n.) An outer garment, or slop.

Oversman (n.) An overseer; a superintendent.

Oversman (n.) An umpire; a third arbiter, appointed when two arbiters, previously selected, disagree.

Oversoul (n.) The all-containing soul.

Overstatement (n.) An exaggerated statement or account.

Overstock (n.) Stock in excess.

Over-story (n.) The clearstory, or upper story, of a building.

Oversum (n.) A sum or quantity over; surplus.

Oversupply (n.) An excessive supply.

Overthrow (n.) The act of overthrowing; the state of being overthrow; ruin.

Overthrow (n.) The act of throwing a ball too high, as over a player's head.

Overthrow (n.) A faulty return of the ball by a fielder, so that the striker makes an additional run.

Overthwart (n.) That which is overthwart; an adverse circumstance; opposition.

Overthwartness (n.) The state of being overthwart; perverseness.

Overtime (n.) Time beyond, or in excess of, a limit; esp., extra working time.

Overtone (n.) One of the harmonics faintly heard with and above a tone as it dies away, produced by some aliquot portion of the vibrating sting or column of air which yields the fundamental tone; one of the natural harmonic scale of tones, as the octave, twelfth, fifteenth, etc.; an aliquot or "partial" tone; a harmonic. See Harmonic, and Tone.

Overtrading (n.) The act or practice of buying goods beyond the means of payment; a glutting of the market.

Overtrust (n.) Excessive confidence.

Overturn (n.) The act off overturning, or the state of being overturned or subverted; overthrow; as, an overturn of parties.

Overturner (n.) One who overturns.

Overvaluation (n.) Excessive valuation; overestimate.

Overview (n.) An inspection or overlooking.

Overweener (n.) One who overweens.

Overweening (n.) Conceit; arrogance.

Overweight (n.) Weight over and above what is required by law or custom.

Overweight (n.) Superabundance of weight; preponderance.

Overwet (n.) Excessive wetness.

Overwhelm (n.) The act of overwhelming.

Overwork (n.) Work in excess of the usual or stipulated time or quantity; extra work; also, excessive labor.

Overzeal (n.) Excess of zeal.

Ovicapsule (n.) The outer layer of a Graafian follicle.

Ovicapsule (n.) Same as Ootheca.

Ovicell (n.) One of the dilatations of the body wall of Bryozoa in which the ova sometimes undegro the first stages of their development. See Illust. of Chilostoma.

Ovicyst (n.) The pouch in which incubation takes place in some Tunicata.

Oviduct (n.) A tube, or duct, for the passage of ova from the ovary to the exterior of the animal or to the part where further development takes place. In mammals the oviducts are also called Fallopian tubes.

Oviparity (n.) Generation by means of ova. See Generation.

Ovipositing (n.) Alt. of Oviposition

Oviposition (n.) The depositing of eggs, esp. by insects.

Ovipositor (n.) The organ with which many insects and some other animals deposit their eggs. Some ichneumon files have a long ovipositor fitted to pierce the eggs or larvae of other insects, in order to lay their own eggs within the same.

Ovisac (n.) A Graafian follicle; any sac containing an ovum or ova.

Ovisac (n.) The inner layer of the fibrous wall of a Graafian follicle.

Ovist (n.) Same as Ovulist.

Ovococcus (n.) A germinal vesicle.

Ovoid (n.) A solid resembling an egg in shape.

Ovolo (n.) A round, convex molding. See Illust. of Column.

Ovology (n.) That branch of natural history which treats of the origin and functions of eggs.

Ovoplasma (n.) Yolk; egg yolk.

Ovotesttis (n.) An organ which produces both ova and spermatozoids; an hermaphrodite gland.

Ovulation (n.) The formation of ova or eggs in the ovary, and the discharge of the same. In the mammalian female the discharge occurs during menstruation.

Ovule (n.) The rudiment of a seed. It grows from a placenta, and consists of a soft nucleus within two delicate coatings. The attached base of the ovule is the hilum, the coatings are united with the nucleus at the chalaza, and their minute orifice is the foramen.

Ovule (n.) An ovum.

Ovulist (n.) A believer in the theory (called encasement theory), current during the last century, that the egg was the real animal germ, and that at the time of fecundation the spermatozoa simply gave the impetus which caused the unfolding of the egg, in which all generations were inclosed one within the other. Also called ovist.

Ovulite (n.) A fossil egg.

Ovulum (n.) An ovule.

Ovum (n.) A more or less spherical and transparent mass of granular protoplasm, which by a process of multiplication and growth develops into a mass of cells, constituting a new individual like the parent; an egg, spore, germ, or germ cell. See Illust. of Mycropyle.

Ovum (n.) One of the series of egg-shaped ornaments into which the ovolo is often carved.

Owch (n.) See Ouch.

Owelty (n.) Equality; -- sometimes written ovelty and ovealty.

Owenite (n.) A follower of Robert Owen, who tried to reorganize society on a socialistic basis, and established an industrial community on the Clyde, Scotland, and, later, a similar one in Indiana.

Owl (n.) Any species of raptorial birds of the family Strigidae. They have large eyes and ears, and a conspicuous circle of feathers around each eye. They are mostly nocturnal in their habits.

Owl (n.) A variety of the domestic pigeon.

Owlery (n.) An abode or a haunt of owls.

Owlet (n.) A small owl; especially, the European species (Athene noctua), and the California flammulated owlet (Megascops flammeolus).

Owlism (n.) Affected wisdom; pompous dullness.

Owllight (n.) Glimmering or imperfect light.

Owner (n.) One who owns; a rightful proprietor; one who has the legal or rightful title, whether he is the possessor or not.

Ownership (n.) The state of being an owner; the right to own; exclusive right of possession; legal or just claim or title; proprietorship.

Owre (n.) The aurochs.

Owse (n.) Alt. of Owser

Owser (n.) Tanner's ooze. See Ooze, 3.

Ox (n.) The male of bovine quadrupeds, especially the domestic animal when castrated and grown to its full size, or nearly so. The word is also applied, as a general name, to any species of bovine animals, male and female.

Oxacid (n.) See Oxyacid.

Oxalan (n.) A complex nitrogenous substance C3N3H5O3 obtained from alloxan (or when urea is fused with ethyl oxamate), as a stable white crystal

Oxalantin (n.) A white crystal

Oxalate (n.) A salt of oxalic acid.

Oxaldehyde (n.) Same as Glyoxal.

Oxalethy

Oxa

Oxalis (n.) A genus of plants, mostly herbs, with acid-tasting trifoliolate or multifoliolate leaves; -- called also wood sorrel.

Oxalite (n.) A yellow mineral consisting of oxalate of iron.

Oxaluramide (n.) Same as Oxalan.

Oxalurate (n.) A salt of oxaluric acid.

Oxalyl (n.) A hydrocarbon radical (C2O2) regarded as a residue of oxalic acid and occurring in derivatives of it.

Oxalyl (n.) An old name for carbonyl.

Oxalyl (n.) An old name for carboxyl.

Oxamate (n.) A salt of oxamic acid.

Oxamethane (n.) Ethyl oxamate, obtained as a white scaly crystal

Oxamethylane (n.) Methyl oxamate, obtained as a pearly white crystal

Oxamidine (n.) One of a series of bases containing the amido and the isonitroso groups united to the same carbon atom.

Oxanillamide (n.) A white crystal

Oxanilate (n.) A salt of oxanilic acid.

Oxanilide (n.) a white crystal

Oxbane (n.) A poisonous bulbous plant (Buphane toxicaria) of the Cape of Good Hope.

Oxbird (n.) The dunlin.

Oxbird (n.) The sanderling.

Oxbird (n.) An African weaver bird (Textor alector).

Oxbiter (n.) The cow blackbird.

Oxbow (n.) A frame of wood, bent into the shape of the letter U, and embracing an ox's neck as a kind of collar, the upper ends passing through the bar of the yoke; also, anything so shaped, as a bend in a river.

Oxeye (n.) The oxeye daisy. See under Daisy.

Oxeye (n.) The corn camomile (Anthemis arvensis).

Oxeye (n.) A genus of composite plants (Buphthalmum) with large yellow flowers.

Oxeye (n.) A titmouse, especially the great titmouse (Parus major) and the blue titmouse (P. coeruleus).

Oxeye (n.) The dunlin.

Oxeye (n.) A fish; the bogue, or box.

Oxfly (n.) The gadfly of cattle.

Oxgang (n.) See Bovate.

Oxgoad (n.) A goad for driving oxen.

Oxhead (n.) Literally, the head of an ox (emblem of cuckoldom); hence, a dolt; a blockhead.

Oxheal (n.) Same as Bear's-foot.

Oxheart (n.) A large heart-shaped cherry, either black, red, or white.

Oxhide (n.) The skin of an ox, or leather made from it.

Oxhide (n.) A measure of land. See 3d Hide.

Oxid (n.) See Oxide.

Oxidability (n.) Capability of being converted into an oxide.

Oxidation (n.) The act or process of oxidizing, or the state or result of being oxidized.

Oxidator (n.) An oxidizer.

Oxidator (n.) A contrivance for causing a current of air to impinge on the flame of the Argand lamp; -- called also oxygenator.

Oxide (n.) A binary compound of oxygen with an atom or radical, or a compound which is regarded as binary; as, iron oxide, ethyl oxide, nitrogen oxide, etc.

Oxidizement (n.) Oxidation.

Oxidizer (n.) An agent employed in oxidation, or which facilitates or brings about combination with oxygen; as, nitric acid, chlorine, bromine, etc., are strong oxidizers.

Oxime (n.) One of a series of isonitroso derivatives obtained by the action of hydroxylamine on aldehydes or ketones.

Oxindol (n.) A white crystal

Oxlip (n.) The great cowslip (Primula veris, var. elatior).

Oxonate (n.) A salt of oxonic acid.

Oxonian (n.) A student or graduate of Oxford University, in England.

Oxpecker (n.) An African bird of the genus Buphaga; the beefeater.

Oxshoe (n.) A shoe for oxen, consisting of a flat piece of iron nailed to the hoof.

Oxter (n.) The armpit; also, the arm.

Oxtongue (n.) A name given to several plants, from the shape and roughness of their leaves; as, Anchusa officinalis, a kind of bugloss, and Helminthia echioides, both European herbs.

Oxyacid (n.) An acid containing oxygen, as chloric acid or sulphuric acid; -- contrasted with the hydracids, which contain no oxygen, as hydrochloric acid. See Acid, and Hydroxy-.

Oxyammonia (n.) Same as Hydroxylamine.

Oxybenzene (n.) Hydroxy benzene. Same as Phenol.

Oxychloride (n.) A ternary compound of oxygen and chlorine; as, plumbic oxychloride.

Oxycrate (n.) A Mixture of water and vinegar.

Oxycymene (n.) Hydroxy cymene. Same as Carvacrol.

Oxygen (n.) A colorless, tasteless, odorless, gaseous element occurring in the free state in the atmosphere, of which it forms about 23 per cent by weight and about 21 per cent by volume, being slightly heavier than nitrogen. Symbol O. Atomic weight 15.96.

Oxygen (n.) Chlorine used in bleaching.

Oxygenation (n.) The act or process of combining or of treating with oxygen; oxidation.

Oxygenator (n.) An oxidizer.

Oxygenium (n.) The technical name of oxygen.

Oxygenizement (n.) Oxidation.

Oxygon (n.) A triangle having three acute angles.

OxYhaemacyanin (n.) Alt. of Oxyhaemocyanin

Oxyhaemocyanin (n.) See Haemacyanin.

Oxyhaemoglobin (n.) Alt. of Oxyhemoglobin

Oxyhemoglobin (n.) See Hemoglobin.

Oxymel (n.) A mixture of honey, water, vinegar, and spice, boiled to a sirup.

Oxymethylene (n.) Formic aldehyde, regarded as a methylene derivative.

Oxymoron (n.) A figure in which an epithet of a contrary signification is added to a word; e. g., cruel kindness; laborious idleness.

Oxymuriate (n.) A salt of the supposed oxymuriatic acid; a chloride.

Oxyneurine (n.) See Betaine.

Oxyopia (n.) Alt. of Oxyopy

Oxyopy (n.) Excessive acuteness of sight.

Oxyphenol (n.) A phenol, /////, produced by the distillation of catechin; called also oxyphenic acid, and now pyrocatechin.

Oxyphony (n.) Acuteness or shrillness of voice.

Oxyquino

Oxyrrhodine (n.) A mixture of two parts of the oil of roses with one of the vinegar of roses.

Oxysalt (n.) A salt of an oxyacid, as a sulphate.

Oxysulphide (n.) A ternary compound of oxygen and sulphur.

Oxysulphuret (n.) An oxysulphide.

Oxytocic (n.) An oxytocic medicine or agent.

Oxytoluene (n.) One of three hydroxy derivatives of toluene, called the cresols. See Cresol.

Oxytone (n.) An acute sound.

Oxytone (n.) A word having the acute accent on the last syllable.

Oyer (n.) A hearing or an inspection, as of a deed, bond, etc., as when a defendant in court prays oyer of a writing.

Oylet (n.) See Eyelet.

Oylet (n.) Same as Oillet.

Oynoun (n.) Onion.

Oyster (n.) Any marine bivalve mollusk of the genus Ostrea. They are usually found adhering to rocks or other fixed objects in shallow water along the seacoasts, or in brackish water in the mouth of rivers. The common European oyster (Ostrea edulis), and the American oyster (Ostrea Virginiana), are the most important species.

Oyster (n.) A name popularly given to the delicate morsel contained in a small cavity of the bone on each side of the lower part of the back of a fowl.

Oyster-green (n.) A green membranous seaweed (Ulva) often found growing on oysters but common on stones, piles, etc.

Oystering (n.) Gathering, or dredging for, oysters.

Oysterling (n.) A young oyster.

Ozena (n.) A discharge of fetid matter from the nostril, particularly if associated with ulceration of the soft parts and disease of the bones of the nose.

Ozocerite (n.) A waxlike mineral resin; -- sometimes called native paraffin, and mineral wax.

Ozonation (n.) The act of treating with ozone; also, the act of converting into, or producing, ozone; ozonization.

Ozone (n.) A colorless gaseous substance (O/) obtained (as by the silent discharge of electricity in oxygen) as an allotropic form of oxygen, containing three atoms in the molecule. It is a streng oxidizer, and probably exists in the air, though by he ordinary tests it is liable to be confused with certain other substances, as hydrogen dioxide, or certain oxides of nitrogen. It derives its name from its peculiar odor, which resembles that of weak chlorine.

Ozonification (n.) The act or process of producing, or of subjecting to the action of, ozone.

Ozonization (n.) Ozonation.

Ozonizer (n.) An apparatus or agent for the production or application of ozone.

Ozonometer (n.) An instrument for ascertaining the amount of ozone in the atmosphere, or in any gaseous mixture.

Ozonometry (n.) The measurement or determination of the quantity of ozone.

Ozonoscope (n.) An apparatus employed to indicate the presence, or the amount, of ozone.

About the author

Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English".

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