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[kur-toh-sis] /kɜrˈtoʊ sɪs/
noun, Statistics.
the state or quality of flatness or peakedness of the curve describing a frequency distribution in the region about its mode.
Origin of kurtosis
1900-05; irregular transliteration of Greek kýrtōsis curvature. See cyrtosis Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for kurtosis


(statistics) a measure of the concentration of a distribution around its mean, esp the statistic B2 = m4/m2² where m2 and m4 are respectively the second and fourth moment of the distribution around the mean. In a normal distribution B2 = 3 See also platykurtic, mesokurtic, leptokurtic Compare skewness
Word Origin
from Greek: curvature, from kurtos arched
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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kurtosis in Science
The general form or a quantity indicative of the general form of a statistical frequency curve near the mean of the distribution.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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