/ Dictionary / Index P proctosigmoidoscopy: Meaning and Definition of Find definitions for: proc•to•sig•moid•os•co•py Pronunciation: (prok"tō-sig"moi-dos'ku-pē), [key] — pl. -pies. sigmoidoscopy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. proctosigmoidoscope procumbent Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language