(n.) A conical calcareous fossil, tapering to a point at the lower extremity, with a conical cavity at the other end, where it is ordinarily broken; but when perfect it contains a small chambered cone, called the phragmocone, prolonged, on one side, into a delicate concave blade; the thunderstone. It is the internal shell of a cephalopod related to the sepia, and belonging to an extinct family. The belemnites are found in rocks of the Jurassic and Cretaceous ages.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). belemnite. Retrieved September 21, 2026, from http://smartdefine.org/belemnite/definitions/1979330 |
| Chicago | Webster's. 2011. "belemnite" http://smartdefine.org/belemnite/definitions/1979330 (accessed September 21, 2026). |
| Harvard | Webster's 2011, belemnite, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/belemnite/definitions/1979330>. |
| MLA | Webster's. "belemnite" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/belemnite/definitions/1979330> |