/ Dictionary / Index T teratogenesis: Meaning and Definition of Find definitions for: te•rat•o•gen•e•sis Pronunciation: (tu-rat"u-jen'u-sis, ter'u-tu-), [key] — n. Biol. the production or induction of malformations or monstrosities, esp. of a developing embryo or fetus. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: teratogenesis (Thesaurus) teratogen teratoid Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language