horse power hours

horsepower-hour

[hawrs-pou-er-ouuhr, -ou-er]
noun
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:
1895–1900

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
horsepower-hour
 
n
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 × 106 joules

Collins English Dictionary - Complete & Unabridged 10th Edition
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