belemnite definition

  • noun:
    • A cone-shaped, fossilized inner layer of any of an extinct genus of cephalopods related to the cuttlefish.
    • An extinct band of Mesozoic marine cephalopod, virtually identical in several ways toward modern squid and closely associated with the current cuttlefish.
    • A conical calcareous fossil, tapering to a point within lower extremity, with a conical hole on other end, where it really is ordinarily damaged; however when perfect it includes a little chambered cone, labeled as the phragmocone, prolonged, on a single side, into a delicate concave knife; the thunderstone. It is the interior layer of a cephalopod about the sepia, and belonging to an extinct family members. The belemnites are found in stones for the Jurassic and Cretaceous centuries.
    • A straight, solid, tapering, dart-shaped fossil, the internal bone or layer of a molluscous pet of this extinct family Belemnitid√¶, typical into the Chalk and Jurassic limestone.
    • your pet to which these types of a bone belonged.
    • also referred to as ceraunite.
    • a conical calcareous fossil tapering to a place at one end in accordance with a conical hole at other end containing (whenever unbroken) a small chambered phragmocone from layer of every of numerous extinct cephalopods associated with the household Belemnitidae

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