[ hawrs-pou-er-ouuh r, -ou-er ]
/ ˈhɔrsˌpaʊ ərˌaʊər, -ˌaʊ ər /
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.
Words That Command RespectRead more in this article about some frequently asked questions and fun facts related to our definitions.
Why Did “Noon” Used To Mean 3:00? To most, the word noon signifies a specific time of day–namely, 12:00 midday, a.k.a. “lunchtime.” The counterweight to 12:00 midnight. But, surprisingly, the term noon wasn’t always shorthand for midday at 12:00; in fact, it used to refer to a different time of day altogether. First, some essential background. Clocks and watches are relatively new inventions. Though some timekeeping devices, like sundials and water clocks, …
Origin of horsepower-hour
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for horsepower-hour
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