SPHINCTER

sphincter, anatomical sphincter, sphincter muscle

(noun) a ring of muscle that contracts to close an opening

Source: WordNet® 3.1

Etymology

Noun

sphincter (plural sphincters)

(anatomy) A ringlike band of muscle that surrounds a bodily opening, constricting and relaxing as required for normal physiological functioning.

(in particular) The internal or external anal sphincter, to the extent these are distinguished as two separate entities.

Synonyms

• anatomical sphincter

Source: Wiktionary

Sphinc"ter, n. Etym: [NL., fr. (Anat.)

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

Sphinc"ter, a. (Anat.)

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

Source: Webster’s Unabridged Dictionary 1913 Edition

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