# 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.

Abbreviation: rms.

root mean square

**noun**

1.

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, rms

Tagged: r

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