extrinsic sphincter
n.
A sphincter formed by circular muscular fibers extraneous to the organ.
Nearby words
extrinsic, extrinsic allergic alveolitis, extrinsic eye muscle, extrinsic factor, extrinsic incubation period, extrinsic sphincter, extro-, extrorse, extrospection, extroversion, extrovert
The American Heritage® Stedman's Medical Dictionary
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