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Definition of Belemnite
1. Noun. A conical calcareous fossil tapering to a point at one end and with a conical cavity at the other end containing (when unbroken) a small chambered phragmocone from the shell of any of numerous extinct cephalopods of the family Belemnitidae.
Generic synonyms: Fossil
Derivative terms: Belemnitic
Definition of Belemnite
1. 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.
Definition of Belemnite
1. Noun. (context: paleontology) An extinct group of Mesozoic marine cephalopod, very similar in many ways to the modern squid and closely related to the modern cuttlefish. ¹
¹ Source: wiktionary.com
Definition of Belemnite
1. [n -S]
Medical Definition of Belemnite
1.