Lithocyst
Pronunciation : Lith"o*cyst
Part of Speech : n.
Etymology : [Litho- + cyst.] (Zo?l.)
Definition : Defn: A sac containing small, calcareous concretions (otoliths). They are found in many Medus?, and other invertebrates, and are supposed to be auditory organs.
Source : Webster's Unabridged Dictionary, 1913