/ Dictionary / Index V vitellogenesis: Meaning and Definition of Find definitions for: vi•tel•lo•gen•e•sis Pronunciation: (vi-tel"ō-jen'u-sis, vī-), [key] — n. Embryol. the process by which the yolk is formed and accumulated in the ovum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. vitelline membrane vitellus Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language