/ Dictionary / Index D dioestrus: Meaning and Definition of Find definitions for: di•oes•trus Pronunciation: (dī-es'trus, -ē'strus), [key] — n. Brit. diestrus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dioecious Diogenes 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