pupillary sphincter

/ˌpjupəˈlɛri ˌsfɪŋktər/
IPA guide

Definitions of pupillary sphincter
  1. noun
    a ring of smooth muscle surrounding the iris
    synonyms: musculus sphincter pupillae
    see moresee less
    type of:
    anatomical sphincter, sphincter, sphincter muscle
    a ring of muscle that contracts to close an opening
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