Definition of Biceps

Biceps: The biceps is a muscle that has two heads or origins. In Latin, biceps means two-headed and is derived from "bis", twice + "caput", head.

There is more than one biceps muscle. The biceps brachii is the well-known flexor muscle in the upper arm and bulges when the arm is bent in a C-shape with the fist toward the forehead. The biceps femoris is in the back of the thigh.