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pneumatocyst

[noo-mat-uh-sist, nyoo-, noo-muh-tuh-, nyoo]

noun

Biology.
  1. the cavity of a pneumatophore.

  2. pneumatophore.



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Word History and Origins

Origin of pneumatocyst1

First recorded in 1855–60; pneumato- + -cyst

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pneumato-pneumatograph