from The American Heritage® Dictionary of the English Language, 4th Edition
- n. One of many minute calcareous particles found in the inner ear of vertebrates and in the statocysts of many invertebrates. Also called statolith.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A small particle, comprised mainly of calcium carbonate, found in the inner ear of vertebrates, being part of the balance sense.
from the GNU version of the Collaborative International Dictionary of English
- n. One of the small bones or particles of calcareous or other hard substance in the internal ear of vertebrates, and in the auditory organs of many invertebrates; an ear stone. Collectively, the otoliths are called ear sand and otoconite.
from The Century Dictionary and Cyclopedia
- n. A calcareous concretion within the membranous labyrinth of the ear.
- n. One of the proper otic bones of some animals, as certain fishes; an otosteon. See cuts under Esox and Python.
From Ancient Greek ωτο (ōto), stem of οὖς (ous, "ear") + λίθος (lithos, "stone"). (Wiktionary)