Simple Definition of triceps
: a large muscle along the back of the upper arm
Full Definition of tricepsplural
: a muscle that arises from three heads; especially : the large extensor muscle along the back of the upper arm
Examples of triceps in a sentence
He felt a pain in his right triceps.
Origin and Etymology of triceps
New Latin tricipit-, triceps, from Latin, three-headed, from tri- + capit-, caput head — more at head
First Known Use: 1676
Medical Definition of triceps
: a muscle that arises from three heads:a: the large extensor muscle that is situated along the back of the upper arm, arises by the long head from the infraglenoid tubercle of the scapula and by two heads from the shaft of the humerus, is inserted into the olecranon at the elbow, and extends the forearm at the elbow joint—called also triceps brachiib: the gastrocnemius and soleus muscles viewed as constituting together one muscle—called also triceps surae
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