levator anguli oris
noun
levator an·gu·li oris
-ˈaŋ-gyə-ˌlī-ˈȯr-əs
: a facial muscle that arises from the maxilla, inclines downward to be inserted into the corner of the mouth, and draws the lips up and back
called also caninus
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Merriam-Webster unabridged
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