/ Dictionary / Index F fumariaceous: Meaning and Definition of Find definitions for: fu•mar•i•a•ceous Pronunciation: (fy-mar"ē-ā'shus), [key] — adj. belonging to the plant family Fumariaceae. Cf. fumitory family. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fumarate fumaric 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