/ Dictionary / Index M mutarotation: Meaning and Definition of Find definitions for: mu•ta•ro•ta•tion Pronunciation: (my"tu-rō-tā'shun), [key] — n. Chem. a gradual change in the optical rotation of freshly prepared solutions of reducing sugars. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mutare mutate Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language