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Any of a group of extinct squidlike cephalopod mollusks of the Jurassic and Cretaceous Periods, having a cone-shaped internal shell.
1. (Palaeontology) any extinct marine cephalopod mollusc of the order Belemnoidea, related to the cuttlefish
2. (Palaeontology) the long pointed conical internal shell of any of these animals: a common Mesozoic fossil
[C17: from Greek belemnon dart]
any cylindrical or conical fossil that represents the internal shell of a group of extinct cephalopods allied to the cuttlefish.
[1640–50; < French bélemnite < Greek bélemn(on) a dart, derivative of bállein to throw]
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|Noun||1.||belemnite - 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|
fossil - the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil