Noun
the longest and thickest bone of the human skeleton; extends from the pelvis to the knee
Source: WordNetThe biceps femoris has two heads: The long head has its origin on the ischial tuberosity together with the semitendinosus and acts on two joints. Source: Internet
Rectus femoris is attached to the pelvis with two tendons, while the vasti are inserted to the femur. Source: Internet