/ Dictionary / Index H heterospory: Meaning and Definition of Find definitions for: het•er•os•po•ry Pronunciation: (het"u-ros'pu-rē), [key] — n. Bot. the production of both microspores and megaspores. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heterospory (Thesaurus) heterosporous heterostracan Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language