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extinction    音标拼音: [ɪkst'ɪŋkʃən] [ɪkst'ɪŋʃən]
n. 灭绝,绝种,消灭,熄灭

灭绝,绝种,消灭,熄灭

extinction
n 1: no longer active; extinguished; "the extinction of the
volcano"
2: no longer in existence; "the extinction of a species" [synonym:
{extinction}, {defunctness}]
3: the reduction of the intensity of radiation as a consequence
of absorption and radiation
4: complete annihilation; "they think a meteor cause the
extinction of the dinosaurs" [synonym: {extinction},
{extermination}]
5: a conditioning process in which the reinforcer is removed and
a conditioned response becomes independent of the conditioned
stimulus [synonym: {extinction}, {experimental extinction}]
6: the act of extinguishing; causing to stop burning; "the
extinction of the lights" [synonym: {extinction},
{extinguishing}, {quenching}]

Extinction \Ex*tinc"tion\, n. [L. extinctio, exstinction: cf. F.
extinction.]
1. The act of extinguishing or making extinct; a putting an
end to; the act of putting out or destroying light, fire,
life, activity, influence, etc.
[1913 Webster]

2. State of being extinguished or of ceasing to be;
destruction; suppression; as, the extinction of life, of a
family, of a quarrel, of claim.
[1913 Webster]

3. Specifically: The ceasing to exist of a species of living
organism, such as a plant or animal, whose numbers
declined to the point where the last member of the species
died and therefore no new members of the species could
ever again be born.
[PJC]

Note: Extinctions have occurred many times throughout the
history of life on Earth, and abundant evidence of the
prior existence of animals and plants are found as
fossils in rock formations many millions of years old.
It is believed by some that due to the influence of man
on the environment and destruction of habitat, the rate
of extinction of species is now higher than at any
previous time on this planet. Extinctions of some
animals in recent years have actually been reliably
recorded, such as that of the {dodo bird}. A remarkable
example of extinction is that of the {passenger pigeon}
({Ectopistes migratorius}) in North America, which once
numbered in the billions, and the last living member of
which species was recorded as dying in captivity in
1914.
[PJC]

118 Moby Thesaurus words for "extinction":
abolishment, abolition, abscission, amputation, annihilation,
annulment, bane, biological death, blackout, blocking, burning out,
burnout, cessation of life, choking, choking off, clinical death,
controlling, crossing the bar, curtains, damping, death,
death knell, debt of nature, decease, dematerialization, demise,
departure, deracination, destruction, disappearance, disappearing,
dispersion, dissipation, dissolution, dissolving, doom, dousing,
dying, ebb of life, eclipse, elimination, end, end of life, ending,
eradication, erasure, eternal rest, evanescence, evaporation,
excision, exclusion, exit, expiration, extermination,
extinguishment, extirpation, fadeaway, fadeout, fading,
final summons, finger of death, fire fighting, flame-out, going,
going off, going out, grave, hand of death, jaws of death, knell,
last debt, last muster, last rest, last roundup, last sleep,
leaving life, liquidation, loss of life, making an end, melting,
mutilation, negation, nullification, occultation, parting, passing,
passing away, passing over, perishing, purge, putting out,
quenching, quietus, release, rescission, rest, reward, rooting out,
sentence of death, shades of death, shadow of death, silencing,
sleep, smotheration, smothering, snuffing, snuffing out,
somatic death, stifling, strangulation, suffocation,
summons of death, suppression, uprooting, vanishing,
vanishing point, voiding, wipe


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