any of several muscles having two points of attachment at one end, in particular 二头肌,尤指 ■(亦作 biceps brachii ˈbreɪkɪʌɪ)a large muscle in the upper arm which turns the hand to face palm uppermost and flexes the arm and forearm 肱二头肌 he clenched his fist and exhibited his bulging biceps. 他攥紧拳头,露出突起的臂部肌肉。 ■(亦作 biceps femoris fɪˈmɔːrɪs或 leg biceps)(Anatomy)a muscle in the back of the thigh which helps to flex the leg 股二头肌
语源
mid 17th cent.: from Latin, literally two-headed', from bi- 'two' + -ceps (from caput 'head')