/ Dictionary / Index M mares of Diomedes: Meaning and Definition of Find definitions for: mares' of Diome'des Pronunciation: (mârz), [key] — Class. Myth. Class. Myth. wild mares owned by Diomedes, a Thracian king, who fed them on human flesh: captured by Hercules in fulfillment of one of his labors. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mare's-nest mare's-tail Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language