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Definitions of phragmocone
  1. noun
    the thin conical chambered internal shell (either straight or curved) of a belemnite

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Definition that contains phragmocone
  • belemnite 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
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