Webster’s Revised Unabridged Dictionary · 1913
Rotella
Ro·tel′la (rō·tĕl′lȧ), n. [NL., dim. of rota wheel; cf. LL. rotella a little whell.] (Zoöl.) Any one of numerous species of small, polished, brightcolored gastropods of the genus Rotella, native of tropical seas.