/ Dictionary / Index O oogenesis: Meaning and Definition of Find definitions for: o•o•gen•e•sis Pronunciation: (ō"u-jen'u-sis), [key] — n. Cell Biol. the origin and development of the ovum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oogenesis (Thesaurus) OO gauge oogonium Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language