Definition of Biceps

Biceps: A muscle that has two heads, or origins. There is more than one biceps muscle. The biceps brachii is the well-known flexor muscle in the upper arm; it 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.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=8710
Last Editorial Review: 3/19/2012