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extrinsic sphincter

extrinsic sphincter in Medicine

extrinsic sphincter n.
A sphincter formed by circular muscular fibers extraneous to the organ.

The American HeritageĀ® Stedman's Medical Dictionary
Copyright Ā© 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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