| 单词 | extinct | 
| 释义 | ex·tinct   (ĭk-stĭngkt) adj. 1.  No longer existing or living: an extinct species. See Synonyms at  dead. 2.  No longer burning or active: an extinct volcano. 3.  No longer in use: an extinct custom. [Middle English, from Latin exstīnctus, past participle of exstinguere, to extinguish; see  EXTINGUISH.] | 
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