资料来源 : Webster's Revised Unabridged Dictionary (1913)

Rotella \Ro*tel"la\, n. [NL., dim. of rota wheel; cf. LL.
   rotella a little whell.] (Zo["o]l.)
   Any one of numerous species of small, polished, brightcolored
   gastropods of the genus {Rotella}, native of tropical seas.