noun
levator ani muscle
Anatomical term for the muscle group that supports the pelvic floor and lifts the anus.
肛門挙筋は骨盤底筋群の一部です。
The levator ani muscle is part of the pelvic floor muscles.
Compound of 肛門 (anus) + 挙筋 (levator muscle). The reading こうもんきょきん follows standard on'yomi.