extinctionɪkˈstɪŋk ʃən
English Definitions:
extinction (noun)
no longer active; extinguished
"the extinction of the volcano"
extinction, defunctness (noun)
no longer in existence
"the extinction of a species"
extinction (noun)
the reduction of the intensity of radiation as a consequence of absorption and radiation
extinction, extermination (noun)
complete annihilation
"they think a meteor cause the extinction of the dinosaurs"
extinction, experimental extinction (noun)
a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus
extinction, extinguishing, quenching (noun)
the act of extinguishing; causing to stop burning
"the extinction of the lights"
extinction (Noun)
The action of making or becoming extinct; annihilation.
extinction (Noun)
The absorption or scattering of electromagnetic radiation emitted by astronomical objects by intervening dust and gas before it reaches the observer.
Extinction
In biology and ecology, extinction is the end of an organism or of a group of organisms, normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "re-appears" after a period of apparent absence. Through evolution, new species arise through the process of speciation—where new varieties of organisms arise and thrive when they are able to find and exploit an ecological niche—and species become extinct when they are no longer able to survive in changing conditions or against superior competition. The relationship between animals and their ecological niches has been firmly established. A typical species becomes extinct within 10 million years of its first appearance, although some species, called living fossils, survive with virtually no morphological change for hundreds of millions of years. Most extinctions have occurred naturally, prior to Homo sapiens walking on Earth: it is estimated that 99.9% of all species that have ever existed are now extinct.
Extinction
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included.
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"extinction." Kamus.net. STANDS4 LLC, 2024. Web. 26 Apr. 2024. <https://www.kamus.net/english/extinction>.
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