/ Dictionary / Index M metagenesis: Meaning and Definition of Find definitions for: met•a•gen•e•sis Pronunciation: (met"u-jen'u-sis), [key] — n. Biol. reproduction characterized by the alternation of a sexual generation and a generation that reproduces asexually; alternation of generations. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: metagenesis (Thesaurus) metage metagnathous Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language