/ Dictionary / Index A antimutagenic: Meaning and Definition of Find definitions for: an•ti•mu•ta•gen•ic Pronunciation: (an"tē-my"tu-jen'ik, an"tī-), [key] — adj. Genetics. capable of reducing the frequency of mutation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. antimony yellow antineoplastic Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language