otolith

One of the small calcareous particles found in the inner ear of many vertebrates, especially fishes, which are involved in determining body orientation and sometimes in perceiving sound.

A calcareous concretion within the membranous labyrinth of the ear.

One of the proper otic bones of some animals, as certain fishes; an otosteon. See cuts under Esox and Python.

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.

A small particle, comprised mainly of calcium carbonate, found in the inner ear of vertebrates, being part of the balance sense.