Dictionary entry

Lithocyst

Webster's Dictionary 1913

Lith″o‐cyst (lĭth″ō̍‐sĭst), n. [Litho- + cyst.] (Zoöl.) A sac containing small, calcareous concretions (otoliths). They are found in many Medusæ, and other invertebrates, and are supposed to be auditory organs.