Quadriceps

['kwɒdrɪseps] or ['kwɑdrəsɛps]

(noun.) a muscle of the thigh that extends the leg.

Checked by Genevieve--From WordNet

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

Checker: Witt

n. the great muscle which extends the leg upon the thigh.—adj. Quadricip′ital.

Edited by Bonita