/ Dictionary / Index H heterogenesis: Meaning and Definition of Find definitions for: het•er•o•gen•e•sis Pronunciation: (het"ur-u-jen'u-sis), [key] — n. Biol. alternation of generations, esp. the alternation of parthenogenetic and sexual generations. abiogenesis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heterogenesis (Thesaurus) heterogeneous heterogenetic Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language