(definition) by Webster 1913 Wed Dec 22 1999 at 2:20:48

Pte*roc"e*ras (?), n. [NL., fr. Gr. a wing + a horn.] Zool.

A genus of large marine gastropods having the outer border of the lip divided into lobes; -- called also scorpion shell.

 

© Webster 1913.

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