[wot-ouuh r, -ou-er]
- a unit of energy equal to the energy of one watt operating for one hour, equivalent to 3600 joules. Abbreviation: Wh
Origin of watt-hour
First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for watt-hour
A watt-hour is the amount of energy needed by a device which uses one watt and is operated for one hour.
Electricity is usually purchased by the kilowatt hour, and measured by the watt-hour meter (Fig. 160).
- a unit of energy equal to a power of one watt operating for one hour. 1 watt-hour equals 3600 joules
- A unit of energy, especially electrical energy, equal to the work done by one watt acting for one hour. It is equivalent to 3,600 joules.
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