phragmocone

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English[edit]

English Wikipedia has an article on:
Wikipedia

Etymology[edit]

From phragmo- +‎ cone.

Noun[edit]

phragmocone (plural phragmocones)

  1. (malacology) The chambered portion of the shell of certain cephalopods, divided by septa into camerae. [from 19th c.]
    • 2017, Danna Staaf, Squid Empire, ForeEdge, →ISBN, page 37:
      This ability to continuously add new buoyancy chambers to their phragmocones allowed ancient cephalopods to reach truly stupendous sizes.
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