- a tiny, bonelike particle or stony, platelike structure in the internal ear of lower vertebrates
- a similar calcareous concretion in the statocyst of many invertebrates
Origin of otolithoto- + -lith
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.
- (zoology) A small particle, comprised mainly of calcium carbonate, found in the inner ear of vertebrates, being part of the balance sense.
From Ancient Greek Ï‰Ï„Î¿ (Åto), stem of Î¿á½–Ï‚ (ous, “ear") + Î»Î¯Î¸Î¿Ï‚ (lithos, “stone").