/ Dictionary / Index O ototoxic: Meaning and Definition of Find definitions for: o•to•tox•ic Pronunciation: (ō"tu-tok'sik), [key] — adj. having a harmful effect on the organs or nerves concerned with hearing and balance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ototoxic (Thesaurus) otoscope Otranto Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language