Cardiac Sphincter

Medical Dictionary

cardiac sphincter n.
A physiological sphincter at the esophagogastric junction.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
cardiac sphincter

noun
the valve between the distal end of the esophagus and the stomach; the physiological sphincter at the esophagogastric junction 
WordNet® 3.0, © 2006 by Princeton University.
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