vestigial

ves*ti*gial

adjective

{bc}remaining in a form that is small or imperfectly developed and not able to function {bc}being or having the form of a vestige {dx_def}see {dxt|vestige|vestige|2}{/dx_def}

ves*tige

noun

{bc}a trace, mark, or visible sign left by something (such as an ancient city or a condition or practice) vanished or lost

{bc}the smallest quantity or trace