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The Collaborative International Dictionary
Quintile

Quintile \Quin"tile\, n. [F. quintil aspect, fr. L. quintus the fifth.] (Astron.) The aspect of planets when separated the fifth part of the zodiac, or 72[deg].
--Hutton.

Douglas Harper's Etymology Dictionary
quintile

1610s, originally in astrology, from Latin quintus "the fifth" (see quinque-) + -ile, from quartile. Use in statistics dates to 1951.

Wiktionary
quintile

n. 1 (context statistics English) Any of the quantile which divide an ordered sample population into five equally numerous subsets. 2 (context by extension English) A subset thus obtained. 3 (context astrology English) An aspect of planets that are distant from each other by one fifth of a zodiac (72°)

Wikipedia
Quintile

Quintile may refer to:

  • In statistics, a quantile for the case where the sample or population is divided into fifths
  • Quintiles, a biotechnology research company based in the United States
  • Household income in the United States#Quintiles, a division of households by income into five quantiles in the United States
  • Quintile (astrology), a type of astrological aspect formed by a 72° angle

Usage examples of "quintile".

Council of Economic Advisers, the average income inside this quintile declined by 15 percent between 1979 and 1993.

Only about one-third of Americans in the lowest quintile find themselves there a decade later - the rest move on up to higher incomes.

Only 5 percent of those in the bottom income quintile in 1975 were still there in 1991, whereas nearly 30 percent had moved to the highest income quintile.

Many of those in the lowest quintile are youths entering the workforce in their first Mcjob, from which they can be expected to graduate before long.

In nature it was wholly decorative and conventional, and consisted of crude spirals and angles roughly following the quintile mathematical tradition of the Old Ones, yet seemingly more like a parody than a perpetuation of that tradition.

The income taxes as a percentage of their income of all income groups was reduced, with each of the four lowest quintile groups experiencing greater percentage reductions than those income groups above them.

When Numa Pompilius divided it into twelve months this name of Quintiles was preserved, as well as those that followed--Sexteles, September, October, November, December--although these designations did not accord with the newly arranged order of the months.

At last, after a time the month Quintiles, in which Julius Caesar was born, was called Julius, whence we have July.

Many of those in the lowest quintile are youths entering the workforce in their first Mcjob, from which they can be expected to graduate before long.