noun, plural quad·ri·ceps·es [kwod-ruh-sep-siz] /ˈkwɒd rəˌsɛp sɪz/, quad·ri·ceps. Anatomy.
- a large muscle in front of the thigh, the action of which extends the leg or bends the hip joint.
noun, plural quad·ri·ceps·es [kwod-ruh-sep-siz] /ˈkwɒd rəˌsɛp sɪz/, quad·ri·ceps. Anatomy.