/ Dictionary / Index A antienzyme: Meaning and Definition of Find definitions for: an•ti•en•zyme Pronunciation: (an"tē-en'zīm, an"tī-), [key] — n. Biochem. a substance that inhibits or counteracts the action of an enzyme. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. antienergistic antiestablishment Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language