esophageal achalasia

n.
  1. An esophageal obstruction that develops due to failure of the esophagogastric sphincter to relax, causing the upper esophagus to fill with retained food.cardiospasm
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.