fat tail

== English == === Alternative forms === fat-tail, fattail === Noun === fat tail (plural fat tails) A mass of fat stored in the rump of a beast as an adaptation to heat and harsh environmental conditions or selection by man. The relatively high probability of a relatively extreme outcome. (statistics, probability) A tail of a probability distribution with significantly higher kurtosis than a normal distribution (which has kurtosis = 0). (statistics, probability) A tail of a probability distribution with infinite variance. ==== Synonyms ==== (high probability of extreme outcome): heavy tail (tail of distribution with positive kurtosis): leptokurtosis ==== Related terms ==== fat-tailed ==== Translations ==== ==== See also ==== black swan === Anagrams === tail fat