/ Dictionary / Index M mandelic acid: Meaning and Definition of Find definitions for: man•del'ic ac'id Pronunciation: (man-del'ik, -dē'lik), [key] — Chem. Chem. any of three stereoisomeric acids having the formula CHO, esp. dl-mandelic acid, a white, crystalline, slightly water-soluble solid obtainable from amygdalin: used chiefly in medicine as an antiseptic. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mandela Mandeville 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