sphincter pupillae

(redirected from sphincter muscle of pupil)
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sphinc·ter pu·pil·'lae

[TA]
a ring of smooth muscle fibers surrounding the pupillary border of the iris.

sphinc·ter pu·pil·lae

(sfingk'tĕr pyū-pil'ē) [TA]
A ring of smooth muscle fibers surrounding the pupillary border of the iris.
Synonym(s): musculus sphincter pupillae [TA] , sphincter muscle of pupil.
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