/ Dictionary / Index H heteroecism: Meaning and Definition of Find definitions for: het•er•oe•cism Pronunciation: (het"u-rē'siz-um), [key] — n. Biol. the development of different stages of a parasitic species on different host plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heterodyne heterogamete Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language