What is the long bone above your knee called?

Fibula or Calf bone is a bone placed on the lateral side of the tibia,with which it is connected above and below.It is the smaller of the two bones,and, proportion to its length,the most slender of all the long bones.Its upper extremity is small,placed toward the backbone of the head of the tibia,below the level of the knee-joint and excluded from the formation of the joint.