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