root mean square

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root mean square

n. Statistics
The square root of the average of the squares of a set of numbers.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

root mean square

n
(Mathematics) 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. Abbreviation: rms
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

root′ mean′ square′


n.
the square root of the arithmetic mean of the squares of the numbers in a given set of numbers. Abbr.: rms
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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We have shown that patients with an FPD > or = 124 ms and a root-mean-square voltage of the last 20 ms of the P-wave 20 < or = 3.7 microV have an increased risk of AF after surgery.