rectus femoris

noun

rectus fe·​mo·​ris -ˈfem-ə-rəs 

: a division of the quadriceps muscle lying in the anterior middle region of the thigh, arising from the ilium by two heads, inserted into the tuberosity of the tibia by a narrow flattened tendon, and acting to flex the thigh at the hip and with the rest of the quadriceps to extend the leg at the knee