"Sphincter" is a word in ENGLISH

sphincter ENGLISH
Definition:

Of, pertaining to, or designating, a sphincter; as, a
sphincter muscle.

sphincter ENGLISH
Definition:

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 ENGLISH

A muscle which contracts or closes an orifice, or which compresses an organ; a sphincter.

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