spīrŭla, ae, f. dim. [spira, II. B.],
a small twisted cake or cracknel (post-class.), Arn. 2, 73; Serv. Verg. A. 2, 217.
·noun A genus of cephalopods having a multilocular, internal, siphunculated shell in the form of a f...
Webster's Dictionary of the English Language