| spirula | <zoology> 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. Origin: NL, dim. Of L. Spira a coil. Source: Websters Dictionary (01 Mar 1998) |
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| spirulate | <zoology> Having the colour spots, or structural parts, arranged spirally. Source: Websters Dictionary (01 Mar 1998) |