Definition of “sphincter” - English Dictionary

british dictionary

“sphincter” in British English

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sphincternoun [ C ]

uk /ˈsfɪŋk.tər/ us /ˈsfɪŋk.tɚ/ specialized

a muscle that surrounds an opening in the body and can tighten to close it:

the anal sphincter
a sphincter muscle

(Definition of “sphincter” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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