Any of a group of extinct squidlike cephalopod mollusks of the Jurassic and Cretaceous Periods, having a cone-shaped internal shell.
The cigar-shaped fossilized internal shell of extinct cephalopods (order Belemnoidea) of the Mesozoic Era.
Any of various extinct cephalopod mollusks of the order Belemnoidea that lived from the Triassic into the Tertiary Period. Belemnites had a large, cone-shaped internal shell with a complex structure that served as a support for muscles and as a hydrostatic device. Belemnites were closely related to the present-day squids and cuttlefishes.
The fossilized internal shell of one of these cephalopods. Belemnites are used as index fossils .
Origin of belemnite
- New Latin belemnītēs from Greek belemnon dart gwelə- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition