(Anatomy)any of several muscles having three points of attachment at one end, particularly also triceps brachii ˈbreɪkɪʌɪ the large muscle at the back of the upper arm (剖)(尤指上臂背部的)三头肌
语源
late 16th cent.: from Latin, literally three-headed', from tri- 'three' + -ceps (from caput 'head')