root-mean-square

noun

Definition of root-mean-square

: the square root of the arithmetic mean of the squares of a set of numbers

First Known Use of root-mean-square

1895, in the meaning defined above

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The first known use of root-mean-square was in 1895

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Cite this Entry

“Root-mean-square.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/root-mean-square. Accessed 16 Jan. 2021.

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