/ Dictionary / Index G gastrointestinal: Meaning and Definition of Find definitions for: gas•tro•in•tes•ti•nal Pronunciation: (gas"trō-in-tes'tu-nl), [key] — adj. Anat. of, pertaining to, or affecting the stomach and intestines. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gastrointestinal (Thesaurus) gastrohepatic omentum gastrointestinal series Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language