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WordReference Random House Unabridged Dictionary of American English © 2024root′ mean′ square′, [Math.]- Mathematicsthe square root of the arithmetic mean of the squares of the numbers in a given set of numbers. Abbr.: rms
Collins Concise English Dictionary © HarperCollins Publishers:: root mean square n - the square root of the average of the squares of a set of numbers or quantities: the root mean square of 1, 2, and 4 is √[(1² + 2² + 4²)/3] = √7
Abbreviation: rms
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