Quintile Definition

kwĭntīl, kwĭntl
noun
The aspect of two celestial bodies 72°, or one fifth of a circle, apart.
Webster's New World
Any of the values in a series dividing the distribution of the individuals in the series into five groups of equal frequency.
Webster's New World
Any of these groups.
Webster's New World

(statistics) Any of the quantiles which divide an ordered sample population into five equally numerous subsets.

Wiktionary
(by extension) A subset thus obtained.
Wiktionary

Other Word Forms of Quintile

Noun

Singular:
quintile
Plural:
quintiles

Origin of Quintile

  • Latin quīntus fifth penkwe in Indo-European roots -ile (as in quartile)

    From American Heritage Dictionary of the English Language, 5th Edition

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quintile