Origin of otolith
French otolithe, from ot- + -lithe -lith
First Known Use: circa 1836
Medical Definition of otolith
: a calcareous concretion in the inner ear of a vertebrate or in the otocyst of an invertebrate that is especially conspicuous in many bony fishes where it forms a hard body and in most of the higher vertebrates where it is represented by a mass of small calcareous otoconia—called also statolith
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