Webster's Dictionary, 1913

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Idiomorphic adjective Idiomorphous.

Idiomorphous adjective [ Greek 'idio`morfos of peculiar form; 'i`dios peculiar + ... form.]
1. Having a form of its own.

2. (Crystallog.) Apperaing in distinct crystals; -- said of the mineral constituents of a rock.

Idiomuscular adjective [ Idio- + muscular .] (Physiol.) Applied to a semipermanent contraction of a muscle, produced by a mechanical irritant.

Idiopathetic adjective Idiopathic. [ R.]

Idiopathic, Idiopathical adjective [ Confer French idiopathique .] (Medicine) Pertaining to idiopathy; characterizing a disease arising primarily, and not in consequence of some other disease or injury; -- opposed to symptomatic , sympathetic , and traumatic . -- Id`i*o*path"ic*al*ly , adverb

Idiopathy noun ; plural Idiopathies . [ Greek ...; 'i`dios proper, peculiar + ..., ..., to suffer: confer French idiopathie .]
1. A peculiar, or individual, characteristic or affection.

All men are so full of their own fancies and idiopathies , that they scarce have the civility to interchange any words with a stranger.
Dr. H. More.

2. (Medicine) A morbid state or condition not preceded or occasioned by any other disease; a primary disease.

Idiophanous adjective [ Idio- + ... to appear.] (Crystallog.) Exhibiting interference figures without the aid of a polariscope, as certain crystals.

Idioplasm noun (Biol.) Same as Idioplasma .

Idioplasma noun [ New Latin , from Greek 'i`dios proper, peculiar + ... a form, mold.] (Biol.) That portion of the cell protoplasm which is the seat of all active changes, and which carries on the function of hereditary transmission; -- distinguished from the other portion, which is termed nutritive plasma . See Hygroplasm .

Idiorepulsive adjective [ Idio- + repulsive .] Repulsive by itself; as, the idiorepulsive power of heat.

Idiosyncrasy noun ; plural Idiosyncrasies . [ Greek ...; 'i`dios proper, peculiar + ... a mixing together, from ... to mix together; ... with + ... to mix: confer French idiosyncrasie . See Idiom , and Crasis .] A peculiarity of physical or mental constitution or temperament; a characteristic belonging to, and distinguishing, an individual; characteristic susceptibility; idiocrasy; eccentricity.

The individual mind . . . takes its tone from the idiosyncrasies of the body.
I. Taylor.

Idiosyncratic, Idiosyncratical adjective Of peculiar temper or disposition; belonging to one's peculiar and individual character.

Idiot (ĭd"ĭ*ŏt) noun [ French idiot , Latin idiota an uneducated, ignorant, ill-informed person, Greek 'idiw`ths , also and orig., a private person, not holding public office, from 'i`dios proper, peculiar. See Idiom .]
1. A man in private station, as distinguished from one holding a public office. [ Obsolete]

St. Austin affirmed that the plain places of Scripture are sufficient to all laics, and all idiots or private persons.
Jer. Taylor.

2. An unlearned, ignorant, or simple person, as distinguished from the educated; an ignoramus. [ Obsolete]

Christ was received of idiots , of the vulgar people, and of the simpler sort, while he was rejected, despised, and persecuted even to death by the high priests, lawyers, scribes, doctors, and rabbis.
C. Blount.

3. A human being destitute of the ordinary intellectual powers, whether congenital, developmental, or accidental; commonly, a person without understanding from birth; a natural fool; a natural; an innocent.

Life . . . is a tale
Told by an idiot , full of sound and fury,
Signifying nothing.
Shak.

4. A fool; a simpleton; -- a term of reproach.

Weenest thou make an idiot of our dame?
Chaucer.

Idiotcy noun [ Confer Idiocy .] Idiocy. [ R.]

Idioted adjective Rendered idiotic; befooled. [ R.] Tennyson.

Idiothermic adjective [ Idio- + thermic .] Self-heating; warmed, as the body of animal, by process going on within itself.

Idiotic, Idiotical adjective [ Latin idioticus ignorant, Greek ...: confer French idiotique . See Idiot .]
1. Common; simple. [ Obsolete] Blackwall.

2. Pertaining to, or like, an idiot; characterized by idiocy; foolish; fatuous; as, an idiotic person, speech, laugh, or action.

Idiotically adverb In an idiotic manner.

Idioticon noun [ New Latin , from Greek ... belonging to a private man, private. See Idiot .] A dictionary of a peculiar dialect, or of the words and phrases peculiar to one part of a country; a glossary.

Idiotish adjective Like an idiot; foolish.

Idiotism noun [ French idiotisme , Latin idiotismus the way of fashion of a private person, the common or vulgar manner of speaking, Greek ..., from ... to put into or use common language, from .... See Idiot .]
1. An idiom; a form, mode of expression, or signification, peculiar to a language.

Scholars sometimes give terminations and idiotisms , suitable to their native language, unto words newly invented.
M. Hale.

2. Lack of knowledge or mental capacity; idiocy; foolishness.

Worse than mere ignorance or idiotism .
Shaftesbury.

The running that adventure is the greatist idiotism .
Hammond.

Idiotize intransitive verb To become stupid. [ R.]

Idiotry noun Idiocy. [ R.] Bp. Warburton.

Idle adjective [ Compar. Idler ; superl. Idlest .] [ Middle English idel , Anglo-Saxon īdel vain, empty, useless; akin to Old Saxon īdal , Dutch ijdel , Old High German ītal vain, empty, mere, German eitel , Dan. & Swedish idel mere, pure, and probably to Greek ... clear, pure, ... to burn. Confer Ether .]
1. Of no account; useless; vain; trifling; unprofitable; thoughtless; silly; barren. "Deserts idle ." Shak.

Every idle word that men shall speak, they shall give account thereof in the day of judgment.
Matt. xii. 36.

Down their idle weapons dropped.
Milton.

This idle story became important.
Macaulay.

2. Not called into active service; not turned to appropriate use; unemployed; as, idle hours.

The idle spear and shield were high uphing.
Milton.

3. Not employed; unoccupied with business; inactive; doing nothing; as, idle workmen.

Why stand ye here all the day idle ?
Matt. xx. 6.

4. Given rest and ease; averse to labor or employment; lazy; slothful; as, an idle fellow.

5. Light-headed; foolish. [ Obsolete] Ford.

Idle pulley (Machinery) , a pulley that rests upon a belt to tighten it; a pulley that only guides a belt and is not used to transmit power. -- Idle wheel (Machinery) , a gear wheel placed between two others, to transfer motion from one to the other without changing the direction of revolution. -- In idle , in vain. [ Obsolete] "God saith, thou shalt not take the name of thy Lord God in idle ." Chaucer.

Syn. -- Unoccupied; unemployed; vacant; inactive; indolent; sluggish; slothful; useless; ineffectual; futile; frivolous; vain; trifling; unprofitable; unimportant. -- Idle , Indolent , Lazy . A propensity to inaction is expressed by each of these words; they differ in the cause and degree of this characteristic. Indolent denotes an habitual love to ease, a settled dislike of movement or effort; idle is opposed to busy , and denotes a dislike of continuous exertion. Lazy is a stronger and more contemptuous term than indolent .

Idle intransitive verb [ imperfect & past participle Idled ; present participle & verbal noun Idling .] To lose or spend time in inaction, or without being employed in business. Shak.

Idle transitive verb To spend in idleness; to waste; to consume; -- often followed by away ; as, to idle away an hour a day.

Idle-headed adjective
1. Foolish; stupid. [ Obsolete] "The superstitious idle-headed eld." Shak.

2. Delirious; infatuated. [ Obsolete] L'Estrange.

Idle-pated adjective Idle-headed; stupid. [ Obsolete]

Idleness noun [ Anglo-Saxon īdelnes .] The condition or quality of being idle (in the various senses of that word); uselessness; fruitlessness; triviality; inactivity; laziness.

Syn. -- Inaction; indolence; sluggishness; sloth.

Idler noun
1. One who idles; one who spends his time in inaction; a lazy person; a sluggard.

2. (Nautical) One who has constant day duties on board ship, and keeps no regular watch. Totten.

3. (Machinery) An idle wheel or pulley. See under Idle .

Idless, Idlesse noun Idleness. [ Archaic] "In ydlesse ." Spenser.

And an idlesse all the day
Beside a wandering stream.
Mrs. Browning.

Idly adverb In a idle manner; ineffectually; vainly; lazily; carelessly; (Obsolete) foolishly.

Ido (ē"dō) noun An artificial international language, selected by the "Delegation for the Adoption of an Auxillary International Language" (founded at Paris in 1901), made public in 1907, and subsequently greatly revised and extended by a permanent committee or "Academy." It combines systematically the advantages of previous schemes with a thoroughly logical word formation, and has neither accented constants nor arbitrarily coined pronominal words. For each idea that root is selected which is already most international, on the principle of the "greatest facility for the greatest number of people." The word "Ido" means in the language itself "offspring." The official name is: "Linguo Internaciona di la Delegitaro (Sistema Ido)." -- I"dism noun -- I"dist noun

Idocrase (ĭd"o*krās; 277) noun [ Greek e'i^dos form + kra^sis mixture, from keranny`nai to mix; confer French idocrase .] (Min.) Same as Vesuvianite .

Idol noun [ Middle English idole , French idole , Latin idolum , from Greek ..., from ... that which is seen, the form, shape, figure, from ... to see. See Wit , and confer Eidolon .]
1. An image or representation of anything. [ Obsolete]

Do her adore with sacred reverence,
As th' idol of her maker's great magnificence.
Spenser.

2. An image of a divinity; a representation or symbol of a deity or any other being or thing, made or used as an object of worship; a similitude of a false god.

That they should not worship devils, and idols of gold.
Rev. ix. 20.

3. That on which the affections are strongly (often excessively) set; an object of passionate devotion; a person or thing greatly loved or adored.

The soldier's god and people's idol .
Denham.

4. A false notion or conception; a fallacy. Bacon.

The idols of preconceived opinion.
Coleridge.

Idolastre noun [ Middle English , for idolatre .] An idolater. [ Obsolete] Chaucer.

Idolater noun [ French idolâtre : confer Latin idololatres , Greek .... See Idolatry .]
1. A worshiper of idols; one who pays divine honors to images, statues, or representations of anything made by hands; one who worships as a deity that which is not God; a pagan.

2. An adorer; a great admirer.

Jonson was an idolater of the ancients.
Bp. Hurd.

Idolatress noun A female worshiper of idols.

Idolatrical adjective [ Confer French idolâtrique .] Idolatrous. [ Obsolete]

Idolatrize intransitive verb [ imperfect & past participle Idolatrized ; present participle & verbal noun Idolatrizing .] To worship idols; to pay idolatrous worship.

Idolatrize transitive verb To make in idol of; to idolize.

Idolatrous adjective
1. Of or pertaining to idolatry; partaking of the nature of idolatry; given to idolatry or the worship of false gods; as, idolatrous sacrifices.

[ Josiah] put down the idolatrous priests.
2 Kings xxiii. 5.

2. Consisting in, or partaking of, an excessive attachment or reverence; as, an idolatrous veneration for antiquity.

Idolatrously adverb In a idolatrous manner.

Idolatry noun ; plural Idolatries . [ French idolâtrie , Late Latin idolatria , Latin idololatria , Fr. Greek ...; ... idol + ... service.]
1. The worship of idols, images, or anything which is not God; the worship of false gods.

His eye surveyed the dark idolatries
Of alienated Judah.
Milton.

2. Excessive attachment or veneration for anything; respect or love which borders on adoration. Shak.

Idolish adjective Idolatrous. [ Obsolete] Milton.

Idolism noun The worship of idols. [ Obsolete]

Idolist noun A worshiper of idols. [ Obsolete] Milton.

Idolize transitive verb [ imperfect & past participle Idolized ; present participle & verbal noun Idolizing .]
1. To make an idol of; to pay idolatrous worship to; as, to idolize the sacred bull in Egypt.

2. To love to excess; to love or reverence to adoration; as, to idolize gold, children, a hero.

Idolize intransitive verb To practice idolatry. [ R.]

To idolize after the manner of Egypt.
Fairbairn.

Idolizer noun One who idolizes or loves to the point of reverence; an idolater.