/ Dictionary / Index S sigmoidoscope: Meaning and Definition of Find definitions for: sig•moid•o•scope Pronunciation: (sig-moi'du-skōp"), [key] — n. a rigid or flexible endoscope for visual examination of the rectum and sigmoid colon. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sigmoidoscope (Thesaurus) sigmoid flexure sigmoidoscopy Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language