/ Dictionary / Index R racemism: Meaning and Definition of Find definitions for: rac•e•mism Pronunciation: (ras'u-miz"um, rā-sē'miz-um), [key] — n. Chem. (of a compound) the state of being optically inactive and separable into two other substances of the same chemical composition as the original substance, one of which is dextrorotatory and the other levorotatory, as racemic acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. racemic acid racemization 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