/ Dictionary / Index D dioecious: Meaning and Definition of Find definitions for: di•oe•cious Pronunciation: (dī-ē'shus), [key] — adj. Biol. (esp. of plants) having the male and female organs in separate and distinct individuals; having separate sexes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dioecious (Thesaurus) Diodorus Siculus dioestrus Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language