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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.
1. (Zoology) any of the granules of calcium carbonate in the inner ear of vertebrates. Movement of otoliths, caused by a change in position of the animal, stimulates sensory hair cells, which convey the information to the brain
2. (Zoology) another name for statolith1
o•to•lith(ˈoʊt l ɪθ)
1. a calcareous concretion in the inner ear of lower vertebrates.
a stonelike concretion in the inner ear of some vertebrates, as the whale.See also: Stones