#horsepower__HP__H.P.__h.p.__hp  a unit of power equal to 746 watts
  supertype:  #power_unit__powerunit  a measure of electric power
  part:  #watt__W  a unit of power equal to 1 joule per second; the power dissipated by a current of 1 ampere flowing across a resistance of 1 ohm
     part:  #milliwatt  a unit of power equal to one thousandth of a watt
        part:  #abwatt  a power unit equal to the power dissipated when 1 abampere flows across a potential difference of 1 abvolt (one ten-thousandth of a milliwatt)

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