Definitions for: Sphincter


[n] a ring of muscle that contracts to close an opening



Webster (1913) Definition: Sphinc"ter, n. [NL., fr. ??? to bind tight.] (Anat.)
A muscle which surrounds, and by its contraction tends to
close, a natural opening; as, the sphincter of the bladder.


Sphinc"ter, a. (Anat.)
Of, pertaining to, or designating, a sphincter; as, a
sphincter muscle.

Synonyms: anatomical sphincter, sphincter muscle

See Also: anal sphincter, bladder sphincter, muscle, musculus, musculus sphincter ani, musculus sphincter ductus choledochi, musculus sphincter ductus pancreatici, musculus sphincter pupillae, musculus sphincter pylori, musculus sphincter urethrae, musculus sphincter vesicae, physiological sphincter, pupillary sphincter, pyloric sphincter, pyloric valve, sphincter ani, urethral sphincter

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