/ Dictionary / Index F fumaric: Meaning and Definition of Find definitions for: fu•mar•ic Pronunciation: (fy-mar'ik), [key] — adj. of or derived from fumaric acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fumariaceous fumaric acid Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language