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extinction angle
extinction coefficient

Extinct definitions

Webster's 1828 Dictionary

EXTINCT', a. [L. extinctus. See Extinguish.
1. Extinguished; put out; quenched; as, fire, light or a lamp is extinct.
2. Being at an end; having no survivor; as, a family or race is extinct.
3. Being at an end; having ceased. The enmity between the families is extinct.
My days are extinct. Job 17.
4. Being at an end, by abolition or disuse; having no force; as, the law is extinct.

WordNet (r) 3.0 (2005)

1: no longer in existence; lost or especially having died out leaving no living representatives; "an extinct species of fish"; "an extinct royal family"; "extinct laws and customs" [syn: extinct, nonextant] [ant: extant]
2: (of e.g. volcanos) permanently inactive; "an extinct volcano" [ant: active]
3: being out or having grown cold; "threw his extinct cigarette into the stream"; "the fire is out" [syn: extinct, out]

Merriam Webster's

I. adjective Etymology: Middle English, from Latin exstinctus, past participle of exstinguere Date: 15th century 1. a. no longer burning b. no longer active <an extinct volcano> 2. no longer existing <an extinct animal> 3. a. gone out of use ; superseded b. having no qualified claimant <an extinct title> II. transitive verb Date: 15th century archaic extinguish

Oxford Reference Dictionary

adj. 1 (of a family, class, or species) that has died out. 2 a (of fire etc.) no longer burning. b (of a volcano) that no longer erupts. 3 (of life, hope, etc.) terminated, quenched. 4 (of an office etc.) obsolete. 5 (of a title of nobility) having no qualified claimant. Etymology: ME f. L exstinguere exstinct- (as EX-(1), stinguere quench)

Webster's 1913 Dictionary

Extinct Ex*tinct", a. [L. extinctus, exstinctus, p. p. of extinguere, exstinguere. See Extinguish.] 1. Extinguished; put out; quenched; as, a fire, a light, or a lamp, is extinct; an extinct volcano. Light, the prime work of God, to me is extinct. --Milton. 2. Without a survivor; without force; dead; as, a family becomes extinct; an extinct feud or law.

Webster's 1913 Dictionary

Extinct Ex*tinct", v. t. To cause to be extinct. [Obs.] --Shak.

Collin's Cobuild Dictionary

1. A species of animal or plant that is extinct no longer has any living members, either in the world or in a particular place. It is 250 years since the wolf became extinct in Britain. ADJ 2. If a particular kind of worker, way of life, or type of activity is extinct, it no longer exists, because of changes in society. Herbalism had become an all but extinct skill in the Western world. ADJ 3. An extinct volcano is one that does not erupt or is not expected to erupt any more. Its tallest volcano, long extinct, is Olympus Mons. ADJ

International Standard Bible Encyclopedia

In Job 17:1, "My days are extinct" (za`akh (in Niphal)) and in Isa 43:17, "They are extinct" (da`akh), the word "extinct" should be recognized as a form of the participle, equivalent to "extinguished," so that in both passages an action, not merely a state, is indicated.

Soule's Dictionary of English Synonyms

a. 1. Extinguished, quenched, put out. 2. Ended, terminated, closed, vanished, brought to an end, no longer existing.

Moby Thesaurus

SOL, ago, all bets off, all gone, all off, all over, all up, ancient, annihilated, antediluvian, antiquated, antique, archaic, asleep, at an end, away, blown over, by, bygone, bypast, canceled, cold, collapsed, complete, concluded, dated, dead, dead and buried, deceased, decided, defunct, deleted, demode, departed, disappeared, disused, done, done for, done with, dormant, down the drain, elapsed, ended, exanimate, expired, expunged, extinguished, fallen, fini, finished, forgotten, gone, gone away, gone glimmering, gone out, gone-by, had it, has-been, inactive, irrecoverable, kaput, kaputt, lapsed, late, lifeless, lost, lost to sight, lost to view, missing, no more, nonexistent, obsolete, old hat, old-fashioned, out, out of date, out of sight, out of style, out of use, outmoded, outworn, over, overthrown, passe, passed, passed away, past, past and gone, perfected, perished, quenched, run out, set at rest, settled, shot, superseded, terminated, through, through with, unanimated, vanished, washed up, wiped out, wound up, zapped


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