levator labii superioris

noun
levator la·bii su·pe·ri·or·is | \ -ˈlā-bē-ˌī-su̇-ˌpir-ē-ˈȯr-əs \

Medical Definition of levator labii superioris 

: a facial muscle arising from the lower margin of the orbit and inserting into the muscular substance of the upper lip which it elevates

called also quadratus labii superioris

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