from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The simultaneous generation of electricity and useful heat from a single power source.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The production of heat and/or power from the waste energy of an industrial process
  • noun The simultaneous or serial production of heat and electricity from the same source


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  • "The production of electricity using waste heat (as in steam) from an industrial process or the use of steam from electric power generation as a source of heat" --Merriam-Webster Unabridged

    March 22, 2009