(n.) 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's Revised Unabridged Dictionary
| APA | Webster's. (2011). spirula. Retrieved September 23, 2026, from http://smartdefine.org/spirula/definitions/2065037 |
| Chicago | Webster's. 2011. "spirula" http://smartdefine.org/spirula/definitions/2065037 (accessed September 23, 2026). |
| Harvard | Webster's 2011, spirula, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/spirula/definitions/2065037>. |
| MLA | Webster's. "spirula" 28 May 2011. Web. 23 September 2026. <http://smartdefine.org/spirula/definitions/2065037> |