belemnite

[bel-uh m-nahyt]
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noun Paleontology.

a conical fossil, several inches long, consisting of the internal calcareous rod of an extinct animal allied to the cuttlefish; a thunderstone.

Origin of belemnite

1640–50; < French bélemnite, equivalent to Greek bélemn(on) a dart (noun derivative from base of bállein to throw) + French -ite -ite1
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British Dictionary definitions for belemnite

belemnite

noun

any extinct marine cephalopod mollusc of the order Belemnoidea, related to the cuttlefish
the long pointed conical internal shell of any of these animals: a common Mesozoic fossil

Word Origin for belemnite

C17: from Greek belemnon dart
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for belemnite

belemnite

[bĕləm-nīt′]

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.
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