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

Example:
Are wall sits good basketball exercises to get strong Quadriceps?

Taxonomy
quadriceps, muscles, Quadriceps femoris muscle, femur, layer, free encyclopedia, Thigh muscles, rectus femoris, quads, Adductor brevis muscle, Adductor longus muscle, knee, quadriceps muscles, Adductor hallucis muscle, vastus lateralis, vastus medialis, walking, Lateral aspect.

Defination from the web:
quadriceps is trained in isolation with the leg extension exercise, as well as a part of several other lower body exercises. ... sartorius · quadriceps (rectus femoris, vastus lateralis, vastus intermedius, vastus medialis) · articularis genu. Posterior/hamstring ...