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pneumatocyst

[noo-mat-uh-sist, nyoo-, noo-muh-tuh-, nyoo]
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noun Biology.
  1. the cavity of a pneumatophore.
  2. pneumatophore.
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Origin of pneumatocyst

First recorded in 1855–60; pneumato- + -cyst
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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