The Collaborative International Dictionary of English v.0.48:

Otolith \O"to*lith\, Otolite \O"to*lite\, n. [Oto- + -lith,
   -lite.] (Anat.)
   One of the small bones or particles of calcareous or other
   hard substance in the internal ear of vertebrates, and in the
   auditory organs of many invertebrates; an ear stone.
   Collectively, the otoliths are called ear sand and otoconite.
   [1913 Webster] Otolithic