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

plural of horsepower

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 thermal horsepower

plural of mechanical horsepower

plural of hydraulic horsepower