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sphincter

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noun sphinc·ter \ˈsfiŋ(k)-tər\

Simple Definition of sphincter

  • medical : a ring-shaped muscle that surrounds a body opening and that can tighten to close the opening

Full Definition of sphincter

  1. :  an annular muscle surrounding and able to contract or close a bodily opening

sphinc·ter·ic play \sfiŋ(k)-ˈter-ik\ adjective

Origin of sphincter

Late Latin, from Greek sphinktēr, literally, band, from sphingein to bind tight


First Known Use: 1578


Medical Dictionary

sphincter

play
noun sphinc·ter \ˈsfiŋ(k)-tər\

Medical Definition of sphincter

  1. :  an annular muscle surrounding and able to contract or close a bodily opening—see anal sphincter, cardiac sphincter, precapillary sphincter, pyloric sphincter

  2. sphinc·ter·al \-t(ə-)rəl\play adjective




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