/ Dictionary / Index O otosclerosis: Meaning and Definition of Find definitions for: o•to•scle•ro•sis Pronunciation: (ō"tu-skli-rō'sis), [key] — n. Pathol. formation of new bone about the stapes or cochlea, resulting in hearing loss. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: otosclerosis (Thesaurus) otorrhea otoscope Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language