ileocecal valve

Medical Dictionary

ileocecal valve n.
The bilabial prominence of the terminal ileum into the large intestine at the cecocolic junction in cadavers; it appears as a truncated cone with a star-shaped orifice in the living. Also called ileocolic valve.

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
ileocecal valve

noun
valve between the ileum of the small intestine and the cecum of the large intestine; prevents material from flowing back from the large to the small intestine 
WordNet® 3.0, © 2006 by Princeton University.
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