Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Late Latin
Origin: Greek, from sphingein 'to tie tightly'

sphincter

 noun
     
Related topics: Human
sphinc‧ter [countable] medical
HBH a muscle that surrounds an opening in your body, and can become tight in order to close the opening
Definition from the Longman Dictionary of Contemporary English
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