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volt-ampere a unit of electrical power equal to the product of one volt and one ampere, or to one watt.
W2 abbreviation of "watt" or "watts." [1/2 definitions]
W4 abbreviation of "watt," or "watts," a unit of electrical power equal to the current of one ampere produced by the electromotive force of one volt, or to one joule per second.
watt-hour a unit of electrical energy equal to the energy of one watt operating for one hour, or 3,600 joules.