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vestigial

adjective
 
 
/vesˈtɪdʒ.i.əl/

Definition

[before noun] being a small remaining part or amountStaying and remainingWaiting specialized describes 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/tailOf little or less importance vestigially
 
 
/-i/ adverb
Of little or less importance
(Definition of vestigial adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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