root mean square


noun Mathematics.

the square root of the arithmetic mean of the squares of the numbers in a given set of numbers. Abbreviation: rms

Nearby words

  1. root for,
  2. root ginger,
  3. root graft,
  4. root hair,
  5. root knot,
  6. root nodule,
  7. root of lung,
  8. root of nail,
  9. root of penis,
  10. root of the matter

Origin of root mean square

First recorded in 1890–95

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


British Dictionary definitions for root mean square

root mean square

noun

the square root of the average of the squares of a set of numbers or quantitiesthe root mean square of 1, 2, and 4 is √[(1² + 2² + 4²)/3] = √7 Abbreviation: rms
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012