/ Dictionary / Index T trypsinogen: Meaning and Definition of Find definitions for: tryp•sin•o•gen Pronunciation: (trip-sin'u-jun, -jen"), [key] — n. Biochem. a precursor of trypsin that is secreted by the pancreas and is activated to trypsin in the small intestine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: trypsinogen (Thesaurus) trypsin tryptophan Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language