otosteon

[ō-tŏstē-ŏn′]
n.
  1. Any of the small bones of the middle ear.
  2. A calcareous concretion in the inner ear that is larger than a statoconium.otolith
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.