/ Dictionary / Index O otoscope: Meaning and Definition of Find definitions for: o•to•scope Pronunciation: (ō'tu-skōp"), [key] — n. Med. an instrument for examining the external canal and tympanic membrane of the ear. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: otoscope (Thesaurus) otosclerosis ototoxic Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language