Belemnite

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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.
  • 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.
  • 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.
  • 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.
  • 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
  • Hypernym
    Words that are more generic or abstract
    fossil   
    Synonym
    Words with the same meaning
    belemnoid