an abnormal narrowing of the valve at the outlet from the stomach, preventing normal passage of food into the small intestine.
Origin of pyloric stenosis
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Narrowing of the gastric pylorus, especially by congenital muscular hypertrophy or by scarring resulting from a peptic ulcer.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.