from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A unit of electric energy equal to the work done by one kilowatt acting for one hour.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a unit of electrical energy equal to that done by one kilowatt acting for one hour
  • n. a “unit” of electrical consumption by which domestic consumers are charged

from The Century Dictionary and Cyclopedia

  • n. The energy developed in one hour by a kilowatt of power or activity: a practical unit of energy.


Sorry, no etymologies found.


  • The work of such a current for one hour is called a _kilowatt-hour_, and in our cities, where electricity is generated from steam, the retail price of a kilowatt-hour varies from

    Electricity for the farm Light, heat and power by inexpensive methods from the water wheel or farm engine

  • In the paper, they project batteries that cost $250 per kilowatt-hour, which is less than half of today's prices.


  • The Leaf or comparable EV operating on electricity at the national average of 11 cents per kilowatt-hour will cost 2.6 cents per mile.

    Five Reasons To Like Nissan Leaf

  • In Palo Alto, California, more than one in five residents participate in PaloAltoGreen, a voluntary renewable-energy program that costs just 1.5 cents more per kilowatt-hour.

    Michael Brune: Five Easy Ways to Get Clean Energy

  • The report, validated by the independent Illinois Commerce Commission ICC, notes that power produced by Tenaska will cost 21.2 cents per kilowatt-hour, which is roughly 500% higher than current wholesale electric prices in the Midwest.

    Tenaska Benefits a Few at High Cost

  • Last week a Minneapolis firm called TenKsolar announced that it reckons it can soon cut the cost of rooftop solar power in sunny locations to as little as eight cents a kilowatt-hour—which is almost competitive with conventional electricity.

    Three Cheers for the Cheapeners and Cost-Cutters

  • But if wind energy doesn't significantly reduce carbon dioxide emissions, then critics can easily challenge the industry's hefty subsidies, which include the federal production tax credit of $0.022 for each kilowatt-hour of electricity.

    A New Study Takes The Wind Out Of Wind Energy

  • According to estimates by Dilip Warrier , an analyst at investment bank Stifel Financial Corp., A123's cost of building batteries is about $1,000 per kilowatt-hour, while some Asian manufacturers are bidding as low as $400.

    Battery Companies in Need of a Boost

  • A company spokesman says at this point "it's fairly meaningless" to provide a general dollar figure per kilowatt-hour, because the company's factories are not yet fully utilized.

    Battery Companies in Need of a Boost

  • That generator is a greater concern: The onboard electricity - used to run lights, fridges, exhaust hoods, microwaves and air conditioning - is likely to be dirtier per kilowatt-hour than the electricity powering a restaurant.

    Are food carts environmentally superior to restaurants?


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