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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n 1: no longer active; extinguished; "the extinction of the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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  • Extinction - Wikipedia
    Species that are not globally extinct are termed extant Those species that are extant, yet are threatened with extinction, are referred to as threatened or endangered species The dodo of Mauritius, shown here in a 1626 illustration by Roelant Savery, is an often-cited example of modern extinction [28]
  • Extinction | Definition Examples | Britannica
    Extinction, in biology, is the dying out or extermination of a species It occurs when species are diminished because of environmental forces (natural or human-made) or because of evolutionary changes in their members Learn more about mass extinctions and modern extinctions
  • Has Life on Earth Survived More Than Five Mass Extinctions?
    Extinction is a fact of life Of all the species that have ever evolved on our planet, the overwhelming majority no longer exist Even as life continues to evolve and respond to Earth’s
  • How Many Mass Extinctions Have There Been On Earth? - BGR
    Did you know that over the last 500 million years, our planet experienced five major mass extinction events? These events are periods when life on Earth changed drastically Thousands of species
  • The 5 mass extinction events that shaped the history of Earth — and the . . .
    Scientists define a mass extinction as around three-quarters of all species dying out over a short geological time, which is anything less than 2 8 million years, according to The Conversation
  • Major Mass Extinctions | Britannica
    Mass extinction events, such as the one that killed the non-avian dinosaurs, have shaped the course of life on Earth Learn more about five of the biggest mass extinctions in Earth’s history—and about the one that is overtaking Earth today
  • Extinction (2018) - IMDb
    Extinction: Directed by Ben Young With Michael Peña, Lizzy Caplan, Amelia Crouch, Erica Tremblay A father has a recurring dream of losing his family His nightmare turns into reality when the planet is invaded by a force bent on destruction
  • More than cuddly critters. Climate change puts unusual plants at risk . . .
    Thousands of unusual flowering plants now at risk While Dong’s study looks at future extinction risk, a second study published Thursday in the same journal looked at the current extinction risk of flowering plants, a group with more than 335,000 species, more than most varieties of flora and fauna
  • A Fossil Trove in China Provides a Rare Window Into a Mass Extinction . . .
    When considering mass extinctions, people often think of the asteroid strike that wiped out all non-avian dinosaurs But life on Earth has experienced many extinction events Now, a trove of
  • A slowdown, not salvation: what new extinction data reveal about the . . .
    For decades, biologists have warned that humanity is precipitating a sixth mass extinction By some estimates, species are vanishing at up to a thousand times the natural background rate Yet a new study in Proceedings of the Royal Society B suggests the picture is more complicated





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