plural of horsepower

(uncountable) Power derived from the motion of a horse.

The useful horsepower of an engine as measured at its drive shaft.

plural of brake horsepower

(mechanical engineering) In an engine, the power measured in horse power delivered to a rotating shaft, which could be in a turbine, or transmission.

plural of horsepower-hour

(electricity) A unit of energy equal to the amount of work a horse is capable of delivering during an hour.

plural of hydraulic horsepower

plural of mechanical horsepower

(electricity) The horsepower of an electric motor, determined by the readings from a thermal-type ammeter.