口こう輪りん筋きんMeanings1nounorbicularis oris muscleanatomyAnatomical term for the ring-shaped muscle surrounding the mouth; used in medical and biological contexts.口こう輪りん筋きんは唇くちびるを閉とじたり、すぼめたりする働はたらきがある。The orbicularis oris muscle functions to close and purse the lips.
