vestigial
美 [vesˈtɪdʒiəl]英 [ves'tɪdʒiəl]
- adj.残留的;残余的;退化的
- 网络发育不全的;遗迹的;残翅

adj.
vestigial
1.残留的;残余的;退化的remaining as the last small part of sth that used to exist
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