noun
quadriceps muscle
Anatomical term for the large muscle group at the front of the thigh.
大腿四頭筋は太ももの前面にある大きな筋肉です。
The quadriceps muscle is a large muscle on the front of the thigh.
From 大腿 (thigh) + 四頭筋 (quadriceps, literally 'four-headed muscle').