quadriceps

The large four-part extensor muscle at the front of the thigh.

In anatomy, the quadriceps extensor cruris of the thigh; the great muscle which extends the leg upon the thigh, considered as consisting of the rectus, cruræus, and vastus internus and externus.

The great extensor muscle of the knee, divided above into four parts which unite in a single tendon at the knee.

A muscle having four heads, especially the large extensor at the front of the thigh.

a muscle of the thigh that extends the leg