(definition) by Webster 1913 Wed Dec 22 1999 at 3:20:07

Spir"u*la (?), n. [NL., dim. of L. spira a coil.] Zool.

A genus of cephalopods having a multilocular, internal, siphunculated shell in the form of a flat spiral, the coils of which are not in contact.

 

© Webster 1913.

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