/ Dictionary / Index G gastroscope: Meaning and Definition of Find definitions for: gas•tro•scope Pronunciation: (gas'tru-skōp"), [key] — n. Med. a lighted flexible tubular instrument passed through the mouth for examining the esophagus, stomach, and duodenum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gastroscope (Thesaurus) gastropod gastroscopy Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language