Cases of word usage

1) the outer and smaller of the two bones from the knee to the ankle (fibula)

2) breeches for horse-riding, close-fitting from the knee to the ankle (jodhpurs)

3) the part of the human leg between the knee and the hip; the similar part of the back legs of other animals (thigh)

4) the inner and thicker of the two bones between the knee and the foot (tibia)