下か腿たい三さん頭とう筋きんかたいさんとうきんMeanings1nountriceps surae muscle; calf tricepsanatomy›Anatomical term for the muscle group at the back of the lower leg, consisting of the gastrocnemius and soleus muscles.下か腿たい三さん頭とう筋きんは、腓ひ腹