vestigial

from WordNet (r) 3.0 (2006)
vestigial
    adj 1: not fully developed in mature animals; "rudimentary
           wings" [syn: {vestigial}, {rudimentary}]
from The Collaborative International Dictionary of English v.0.48
Vestigial \Ves*tig"i*al\, a.
   Of or pertaining to a vestige or remnant; like a vestige.
   [1913 Webster]
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