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belemnite

[ bel-uhm-nahyt ]
/ ˈbɛl əmˌnaɪt /
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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.
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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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use belemnite in a sentence

British Dictionary definitions for belemnite

belemnite
/ (ˈbɛləmˌnaɪt) /

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

Scientific 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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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