sphincter
sphinc·ter
noun \ˈsfiŋ(k)-tər\Definition of SPHINCTER
: an annular muscle surrounding and able to contract or close a bodily opening
— sphinc·ter·ic \sfiŋ(k)-ˈter-ik\ adjective
See Origin of SPHINCTER
Late Latin, from Greek sphinktēr, literally, band, from sphingein to bind tight
First Known Use: 1578
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