otolith

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statolith

 [stat´o-lith]
1. a granule of the statoconia.
2. a solid or semisolid body occurring in the labyrinth of animals.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

otolith

(ō′tə-lĭth′)
n.
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.

o′to·lith′ic adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

otolith

(1) An auditory ossicle. 
(2) A larger calcified concrement within the ear.
(3) A minute calcium carbonate granule located near the sensory hair cell in the inner ear; statolith.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

otolith

One of the many tiny calcareous particles found in the utricle and sacculus of the inner ear. These move under gravitational and accelerative forces causing stimulation of hair cells and the production of nerve impulses that provide the brain with information about the position and movement of the head.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

otolith

or

otoconium

a granule of calcareous material, several of which occur in the inner ear of vertebrates, where they are attached to processes associated with sensitive cells, and register gravity By means of such sense organs, vertebrates are able to assess their position with respect to gravity.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005