Medical Dictionary

sphincter

noun sphinc·ter \ˈsfiŋ(k)-tər\

Medical Definition of SPHINCTER

:  an annular muscle surrounding and able to contract or close a bodily opening—see anal sphincter, cardiac sphincter, precapillary sphincter, pyloric sphincter
sphinc·ter·al \-t(ə-)rəl\ adjective
June 30, 2015
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