| genus spirula | (n) genus of small cephalopods with many-chambered spiral shells resembling those of the extinct belemnites |
| spirula | (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 |
| Spini-spirulate | a. (Zool.) Having spines arranged spirally. See Spicule. [ 1913 Webster ] |
| Spirula | ‖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. [ 1913 Webster ] |
| Spirulate | n. (Zool.) Having the color spots, or structural parts, arranged spirally. [ 1913 Webster ] |
| スピルラ | [supirura] (n) spirula [Add to Longdo] |