vestigial
adjectiveDefinition of vestigial
1
of a body part or organ
: remaining in a form that is small or imperfectly developed and not able to function : being or having the form of a vestige (see vestige sense 2)
a vestigial tail Kiwis lack an external tail, and their vestigial wings are entirely hidden beneath a curious plumage—shaggy, more like fur than feathers …— Stephen Jay Gould
2
: remaining as the last small part of something that existed before
It's held in the Gold Room, a vestigial ballroom of the kind that every downtown hotel uses for banquets and conventions.— William Zinsser Later colonial laws … prohibited even speaking the Pequot language, now long dead but for a few vestigial words.— Kirk Johnson
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