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1. (n.) sphincter
a circular band of voluntary or involuntary muscle that encircles and closes an orifice of the body or one of its hollow organs.
Etymology: (1905–10; < NL Sphingidae family name, der. of Sphing-, s. of Sphinx a genus (L: sphinx ))
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| Definition of 'sphincter' |
Princeton's WordNet |
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1. (noun) sphincter, anatomical sphincter, sphincter muscle
a ring of muscle that contracts to close an opening
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| Definition of 'sphincter' |
Webster Dictionary |
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1. (adj) sphincter
of, pertaining to, or designating, a sphincter; as, a sphincter muscle
2. (noun) sphincter
a muscle which surrounds, and by its contraction tends to close, a natural opening; as, the sphincter of the bladder
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Definitions of sphincter 
