quintile

quintile
[ˈkwɪntɪl, -ʌɪl]
noun
  1. (Statistics)any of five equal groups into which a population can be divided according to the distribution of values of a particular variable
    (统计)五分位数
    ■each of the four values of the random variable which divide a population into five such groups
    (五分位数中的)四个值之一
  2. [mass noun](Astrology)an aspect of 72° (one fifth of a circle)
    (占星)(天体的)五分一对座
语源
  1. early 17th cent.: from Latin quintilis (mensis) 'fifth month, July', from quintus 'fifth'
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