Breadcrumb Home > Dictionary > Index R rice bean: Meaning and Definition of Find definitions for: rice' bean" Pronunciation: [key] a twining southern Asian vine, Vigna umbellata, of the legume family, cultivated for its edible seeds. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rice ricebird ✖ Related Content Daily Word Quiz: tendentious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language