/ Dictionary / Index Z zygogenesis: Meaning and Definition of Find definitions for: zy•go•gen•e•sis Pronunciation: (zī"gō-jen'u-sis, zig"ō-), [key] — n. Biol. the formation of a zygote. reproduction by means of gametes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. zygodactyl zygoma Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language