noun
levator anguli oris; caninus
Anatomical term for the facial muscle that lifts the corner of the mouth.
口角挙筋は、口角を引き上げる表情筋の一つです。
The levator anguli oris is one of the facial muscles that lifts the corner of the mouth.
Compound of 口角 (kōkaku, 'corner of the mouth') + 挙筋 (kyokin, 'levator muscle'). The reading is on'yomi throughout.