pneumatocyst

[ noo-mat-uh-sist, nyoo-, noo-muh-tuh-, nyoo ]
/ nʊˈmæt ə sɪst, nyʊ-, ˈnu mə tə-, ˈnyu /

noun Biology.

the cavity of a pneumatophore.

Origin of pneumatocyst

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

Example sentences from the Web for pneumatocyst