noun
zygomaticus minor muscle
Anatomical term for a small facial muscle that helps lift the upper lip.
小頬骨筋は上唇を引き上げる働きがある。
The zygomaticus minor muscle functions to lift the upper lip.
The zygomaticus major muscle, which is larger and primarily draws the angle of the mouth upward and laterally, whereas the zygomaticus minor mainly elevates the upper lip.
From 小 (small) + 頬骨 (cheekbone) + 筋 (muscle), a direct anatomical calque of the Latin term.