#hind_leg  the back limb of a quadruped
  supertype:  hind_limb  a posterior leg or homologous structure in other animals
  part of:  quadruped
  part:  hock  tarsal joint of the hind leg of hoofed mammals; corresponds to the human ankle
  part:  gaskin  lower part of a horse's thigh between the hock and the stifle
  part:  stifle__knee  joint between the femur and tibia in a quadruped; corresponds to the human knee

No statement uses or specializes hind_leg; click here to add one.