adjective Statistics.
(of a frequency distribution) being more concentrated about the mean than the corresponding normal distribution.
(of a frequency distribution curve) having a high, narrow concentration about the mode.

1900–05; lepto- + irregular transliteration of Greek kyrt(ós) swelling + -ic

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World English Dictionary
leptokurtic (ˌlɛptəʊˈkɜːtɪk)
statistics platykurtic Compare mesokurtic (of a distribution) having kurtosis B2 greater than 3, more heavily concentrated about the mean than a normal distribution
[C20: from lepto- + Greek kurtos arched, bulging + -ic]

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Example sentences
The sands are moderately to poorly sorted, finely skewed to nearly symmetrical, and leptokurtic.
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