otolith

noun

1. Anatomy, Zoology. a calcareous concretion in the internal ear of vertebrates.
2. statolith(def 1).

noun

1. 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. another name for statolith (def. 1)

n.

1. Any of numerous minute calcareous particles found in the inner ear of certain lower vertebrates and in the statocysts of many invertebrates.
2. otosteon