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mean square

noun, Statistics.
the mean of the squares of a set of numbers.
Origin of mean square
First recorded in 1835-45 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Historical Examples
  • The angles at the top of the mean square tower are bevelled off to allow of a short octagonal spire and an octagonal balustrade.

    Old and New London Walter Thornbury

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