living fossil
noun
/ˈlɪvɪŋ ˈfɑsl̩/
,
/ˈlɪvɪŋ ˈfɒsl̩/
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- (evolutionary theory) Any species discovered first as a fossil and believed extinct, but which is later found living; an organism that has remained unchanged over geological periods. [from 1859]
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生きた化石,
生きている化石
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