| 单词 | extinct |
| 释义 | extinct (once / 816 pages) adj Something that no longer exists and has no living representative is extinct. Dinosaurs are extinct. Polar bears may become extinct. Sadly, history teachers who force their students to memorize long lists of dates are in no danger of becoming extinct. You often hear of a species being extinct: there are no living representatives of the species left. But extinct also describes something that has gone out or grown cold, as in a dormant volcano "extinct volcano" or a tobacco pipe whose flame has died out "extinct pipe." That’s because extinct comes from the Latin extinguere/exstinguere for "extinguish." Originally extinct referred to fires that died out (were extinguished). Its meaning grew to encompass a family line and then a species. WORD FAMILYextinct: extincter USAGE EXAMPLESNine different species from extinct lizards to trapdoor spiders got their names from the 44th U.S. president, which is more than any of his predecessors. Science Magazine(Dec 29, 2016) Urgent action is needed to stop the cheetah - the world's fastest land animal - becoming extinct, scientists say. BBC(Dec 27, 2016) Most move on, but Kevin Esvelt became transfixed at a young age by the idea that these extinct creatures were somehow related to us. The New Yorker(Dec 25, 2016) 1adj no longer in existence; lost or especially having died out leaving no living representatives an extinct species of fish an extinct royal family extinct laws and customs Syn|Ant nonextant nonexistent not having existence or being or actuality deadnot surviving in active use extant still in existence; not extinct or destroyed or lost existent, existinghaving existence or being or actuality livingstill in active use living, survivingstill in existence 2adj (of e.g. volcanos) permanently inactive an extinct volcano Syn|Ant dead physically inactive active (of e.g. volcanos) capable of erupting alive, livecapable of erupting liveexerting force or containing energy 3adj being out or having grown cold threw his extinct cigarette into the stream Syn out dead not showing characteristics of life especially the capacity to sustain life; no longer exerting force or having energy or heat |
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