/ Dictionary / Index D didymous: Meaning and Definition of Find definitions for: did•y•mous Pronunciation: (did'u-mus), [key] — adj. Bot. occurring in pairs; paired; twin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. didymium didynamous Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language