ROOT-MEAN-SQUARE (RMS) By N., Pam M.S. - April 28, 2013 Square root of the average of the squares of a set of numbers or quantities. For example: the root mean square of 1, 2, and 4 is ?[(1 ROOT-MEAN-SQUARE (RMS): "The root mean square can involve lengthy mathematical operations." Related Psychology Terms BALDWIN'S FIGURE DORSAL ROOT BALANCED LATIN SQUARE INVERSE-SQUARE LAW GRAECO-LATIN SQUARE SUM OF SQUARES FULLERTON-CATTELL LAW PIPER'S LAW MEAN SQUARE WEIGHTED LEAST SQUARES Cite this page: N., Pam M.S., "ROOT-MEAN-SQUARE (RMS)," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/root-mean-square-rms/ (accessed March 31, 2020).