Sphincterectomy
sphincterectomy sphinc·ter·ec·to·my (sfĭngk’tə-rěk’tə-mē)
n.
Excision of a portion of the pupillary border of the iris.
Excision of a sphincter muscle.
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sphincteritis sphinc·ter·i·tis (sfĭngk’tə-rī’tĭs) n. Inflammation of a sphincter.
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sphincter muscle of pupil n. A ring of smooth muscle fibers surrounding the pupillary border of the iris.