from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A cone-shaped, fossilized internal shell of any of an extinct genus of cephalopods related to the cuttlefish.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An extinct group of Mesozoic marine cephalopod, very similar in many ways to the modern squid and closely related to the modern cuttlefish.
from the GNU version of the Collaborative International Dictionary of English
- 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.
from The Century Dictionary and Cyclopedia
- n. A straight, solid, tapering, dart-shaped fossil, the internal bone or shell of a molluscous animal of the extinct family Belemnitidæ, common in the Chalk and Jurassic limestone.
- n. The animal to which such a bone belonged.
- n. Also called ceraunite.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. 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
New Latin belemnītēs, from Greek belemnon, dart; see gwelə- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)