The thigh: the part of the human leg between the hip and the knee (an anatomical term).
大腿の筋肉が張って歩きにくい。
My thigh muscles are tight, making it hard to walk.
CTで大腿の骨折が確認された。
A fracture of the thigh bone was confirmed on the CT.
スポーツ後は大腿をよくストレッチすることが大切だ。
After sports it's important to stretch your thighs well.