/ Dictionary / Index P pyloric stenosis: Meaning and Definition of Find definitions for: pylor'ic steno'sis Pronunciation: [key] — Pathol. Pathol. an abnormal narrowing of the valve at the outlet from the stomach, preventing normal passage of food into the small intestine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pylon pyloroplasty Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language