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harmonic mean

noun, Statistics.
1.
the mean obtained by taking the reciprocal of the arithmetic mean of the reciprocals of a set of nonzero numbers.
Origin
1880-1885
1880-85
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for harmonic mean

harmonic mean

noun
1.
the reciprocal of the arithmetic mean of the reciprocals of a set of specified numbers: the harmonic mean of 2, 3, and 4 is 3(1/2 + 1/3 + 1/4)–1 = 36/13
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
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harmonic mean in Medicine

harmonic mean har·mon·ic mean (här-mŏn'ĭk)
n.
The reciprocal of the arithmetic mean of the reciprocals of a specified set of numbers.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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harmonic mean in Science
harmonic mean  
The reciprocal of the arithmetic mean of the reciprocals of a specified set of numbers.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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