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no longer active ;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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