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root mean square

noun

, Mathematics.
  1. the square root of the arithmetic mean of the squares of the numbers in a given set of numbers. : rms


root mean square

noun

  1. the square root of the average of the squares of a set of numbers or quantities rms

    the root mean square of 1, 2, and 4 is √[(1² + 2² + 4²)/3] = √7



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Word History and Origins

Origin of root mean square1

First recorded in 1890–95

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gallimaufry

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