/ Dictionary / Index T tumorigenesis: Meaning and Definition of Find definitions for: tu•mor•i•gen•e•sis Pronunciation: (t"mur-i-jen'u-sis, ty"-), [key] — n. the production or development of tumors. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tumor tumorigenic Related Content Daily Word Quiz: ravenous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language