rectus femoris
noun
rectus fe·mo·ris
| \ -ˈfem-ə-rəs
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Medical Definition of rectus femoris
: 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