anal sphincter

anal sphincter
noun
the sphincter muscle of the anus
• Part Holonyms: ↑anus

* * *

noun
: either of two sphincters controlling the closing of the vertebrate anus
a. : an outer sphincter of striated muscle extending from the coccyx to the central tendinous part of the perineum and surrounding the anus immediately beneath the skin — called also external anal sphincter
b. : an inner sphincter formed by thickening of the circular smooth muscle of the rectum — called also internal anal sphincter

Useful english dictionary. 2012.

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Look at other dictionaries:

  • anal sphincter — n either of two sphincters controlling the closing of the anus: a) an outer sphincter of striated muscle extending from the coccyx to the central tendinous part of the perineum and surrounding the anus immediately beneath the skin called also… …   Medical dictionary

  • Anal sphincter muscles — can refer to:* Sphincter ani externus muscle * Sphincter ani internus muscle …   Wikipedia

  • anal sphincter — noun The sphincter (= ring muscle) that surrounds the anus (=anal orifice) …   Wiktionary

  • anal sphincter external — musculus sphincter ani externus …   Medical dictionary

  • anal sphincter internal — musculus sphincter ani internus …   Medical dictionary

  • external anal sphincter — n ANAL SPHINCTER (a) …   Medical dictionary

  • internal anal sphincter — n ANAL SPHINCTER (b) …   Medical dictionary

  • external anal sphincter — noun see anal sphincter …   Useful english dictionary

  • internal anal sphincter — noun see anal sphincter …   Useful english dictionary

  • sphincter — [ sfɛ̃ktɛr ] n. m. • 1548; mot lat. d o. gr. ♦ Muscle annulaire disposé autour d un orifice naturel qu il resserre et ferme en se contractant. Sphincter de l anus; sphincter anal, vaginal. ● sphincter nom masculin (bas latin sphincter, du grec… …   Encyclopédie Universelle

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