English definition of Sphincter

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Definition of sphincter

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Sphincter (n.) A muscle which surrounds, and by its contraction tends to close, a natural opening; as, the sphincter of the bladder..

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Constrictor :: Constrictor (n.) A muscle which contracts or closes an orifice, or which compresses an organ; a sphincter..

Sphincter :: Sphincter (n.) A muscle which surrounds, and by its contraction tends to close, a natural opening; as, the sphincter of the bladder..

Sphincter :: Sphincter (a.) Of, pertaining to, or designating, a sphincter; as, a sphincter muscle..

Proctocele :: Proctocele (n.) Inversion and prolapse of the mucous coat of the rectum, from relaxation of the sphincter, with more or less swelling; prolapsus ani..