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kurtosis

[kur-toh-sis]
noun Statistics.
  1. the state or quality of flatness or peakedness of the curve describing a frequency distribution in the region about its mode.
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Origin of kurtosis

1900–05; irregular transliteration of Greek kýrtōsis curvature. See cyrtosis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for kurtosis

kurtosis

noun
  1. statistics a measure of the concentration of a distribution around its mean, esp the statistic B 2 = m 4 / m 2 ² where m 2 and m 4 are respectively the second and fourth moment of the distribution around the mean. In a normal distribution B 2 = 3See also platykurtic, mesokurtic, leptokurtic Compare skewness
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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
kurtosis in Science

kurtosis

[kər-tō′sĭs]
  1. The general form or a quantity indicative of the general form of a statistical frequency curve near the mean of the distribution.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.