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English definition of “vestigial”

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vestigial

adjective uk   /vesˈtɪdʒ.i.əl/ us  
[before noun] being a small remaining part or amount specialized medical used to describe something, especially a part of the body, that has not developed completely, or has stopped being used and has almost disappeared: a vestigial organ/limb/tail
vestigially
adverb uk   /-i/ us  
(Definition of vestigial from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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