Rotella

Ro·tel'la noun [ New Latin , dim. of rota wheel; confer Late Latin rotella a little whell.] (Zoology) Any one of numerous species of small, polished, brightcolored gastropods of the genus Rotella , native of tropical seas.
Found on http://www.encyclo.co.uk/webster/R/96

Rotella

• (n.) Any one of numerous species of small, polished, brightcolored gastropods of the genus Rotella, native of tropical seas.
Found on http://thinkexist.com/dictionary/meaning/rotella/
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