/ Dictionary / Index M moth bean: Meaning and Definition of Find definitions for: moth' bean" Pronunciation: [key] a low, trailing Indian plant, Vigna aconitifolia, of the legume family, having yellow flowers grown for forage and edible, mottled grayish-yellow seeds. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mothball moth-eaten 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