/ Dictionary / Index O oxidoreductase: Meaning and Definition of Find definitions for: ox•i•do•re•duc•tase Pronunciation: (ok"si-dō-ri-duk'tās, -tāz"), [key] — n. Biochem. any of a class of enzymes that act as a catalyst, some of them conjointly, causing the oxidation and reduction of compounds. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oxidoreductase (Thesaurus) oxidizing agent oxime Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language