OTOLITH
Etymology
Noun
otolith (plural otoliths)
(zoology) A small particle, comprised mainly of calcium carbonate, found in the inner ear of vertebrates, being part of the balance sense.
Synonyms
• otoconium
• otosteon
• statoconium
• statolith
Source: Wiktionary
O"to*lith, O"to*lite, n. Etym: [Oto- + -lith, -lite.] (Anat.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition