/ Dictionary / Index D diadelphous: Meaning and Definition of Find definitions for: di•a•del•phous Pronunciation: (dī"u-del'fus), [key] — adj. Bot. (of stamens) united into two sets by their filaments. (of plants) having the stamens so united. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diad diadem Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language