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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n 1: no longer active; extinguished; "the extinction of the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 (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 Fighting for their lives, he comes to realize an unknown strength to keep them safe from harm
  • 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
  • Mass Extinctions Through Geologic Time - Fossils and . . .
    Mass extinctions are spikes or rapid increases in extinction rates that occur over short periods of geologic time, leading to substantial drops in global biodiversity Five mass extinction events through geologic time are known for their particularly profound impacts on life on Earth They are sometimes called the “Big Five:” End Ordovician
  • Extinction Over Time - Smithsonian National Museum of Natural . . .
    Extinction is the death of all members of a species of plants, animals, or other organisms One of the most dramatic examples of a modern extinction is the passenger pigeon Until the early 1800s, billions of passenger pigeons darkened the skies of the United States in spectacular migratory flocks
  • Extinction - Education | National Geographic Society
    Extinction is the dying out of a species Extinction plays an important role in the evolution of life because it opens up opportunities for new species to emerge
  • What is extinction? The answer is complicated. | National . . .
    Extinction is a natural phenomenon: After all, more than 90 percent of all organisms that have ever lived on Earth aren’t alive today But humans have made it worse, accelerating natural
  • EXTINCTION | English meaning - Cambridge Dictionary
    EXTINCTION definition: 1 a situation in which something no longer exists: 2 a situation in which something no longer… Learn more
  • Extinction: Definition, Examples and Causes - Biology Dictionary
    Extinction is a term applied to a known species, of which there are no known living individuals Some species which have suffered extinction are known only from their fossilized remains Others were at one point known to humans, but are gone now
  • What Causes Extinction? - AMNH
    Find out how humans are threatening species, and what we can do to help protect them Humans use thousands of the world’s species in their daily lives for food, shelter, and medicine But these natural resources are limited





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