/ Dictionary / Index M mannan: Meaning and Definition of Find definitions for: man•nan Pronunciation: (man'an, -un), [key] — n. Biochem. any of a group of polysaccharides, found in the ivory nut, carob bean, and the like, that yield mannose upon hydrolysis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. manna lichen Mannar 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