/ Dictionary / Index T tumorigenic: Meaning and Definition of Find definitions for: tu•mor•i•gen•ic Pronunciation: (t"mur-i-jen'ik, ty"-), [key] — adj. (of cells or a substance) capable of producing tumors. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tumorigenesis tumor necrosis factor Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language