Mollusk genus

• A small tropical cephalopod of the genus Spirula having prominent eyes and short arms and a many-chambered shell coiled in a flat spiral

Wiktionary Word definitions in Wiktionary
n. Any mollusk of the cephalopod genus (taxlink Spirula genus noshow=1), of which (taxlink Spirula spirula species noshow=1) is the only extant species.

Wikipedia Word definitions in Wikipedia
Spirula spirula is a species of deep-water squid -like cephalopod mollusk . It is the only extant member of the genus Spirula , the family Spirulidae , and the order Spirulida . Because of the shape of its internal shell, it is commonly known as the ram's ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Spirula \Spir"u*la\, n. [NL., dim. of L. spira a coil.] (Zo["o]l.) 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.

WordNet Word definitions in WordNet
n. a small tropical cephalopod of the genus Spirula having prominent eyes and short arms and a many-chambered shell coiled in a flat spiral [syn: Spirula peronii ]