horsepower-hour

[hawrs-pou-er-ouuh r, -ou-er]
noun
  1. a foot-pound-second unit of energy or work, equal to the work done by a mechanism with a power output of one horsepower over a period of one hour.

Origin of horsepower-hour

First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for horsepower-hour

horsepower-hour

noun
  1. an fps unit of work or energy equal to the work done by 1 horsepower in 1 hour. 1 horsepower-hour is equivalent to 2.686 × 10 6 joules
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012