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Pronunciation: pow'er


  1. In optics, the refractive vergence of a lens.
  2. In physics and engineering, the rate at which work is done.
  3. The exponent of a number or expression that provides the number of times that number has to be multiplied by itself.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.