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 (kwĭn′tīl′, kwĭnt′l)
1. The astrological aspect of planets distant from each other by 72° or one fifth of the zodiac.
2. Statistics
a. Any of the groups that result when a frequency distribution is divided into five groups of equal size.
b. Any of the values that separate each of these groups.

[Latin quīntus, fifth; see penkwe in Indo-European roots + -ile (as in quartile).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Astrology) an aspect of 72° between two heavenly bodies
2. (Astrology) a fifth part of a distribution
[C17: from Latin quintus fifth]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
The researchers observed a reduction in SCC risk with higher total vitamin A; the pooled multivariate hazard ratios were 0.97 (95 percent confidence interval [CI], 0.87 to 1.07) for quintile 2, 0.97 (95 percent CI, 0.80 to 1.17) for quintile 3, 0.93 (95 percent CI, 0.84 to 1.03) for quintile 4, and 0.83 (95 percent CI, 0.75 to 0.93) for quintile 5, compared with quintile 1 as a reference.
Panel A in Table 1 shows the average returns and basic characteristics of the buy-and-hold strategy for the quintile individual stock.
Based on this, they devised a scoring formula that gives a person a rating of 1-5 for each of these seven food types, from the lowest quintile of consumption, which scores 1, to the highest quintile, which scores 5.
Surprisingly, it has two scores in the second quintile for individual categories: while purpose is a first-quintile 36, both social and financial are second-quintile scores, at 51 and 44 respectively.
"For both coronary and cardiovascular events, most of the increased risk appears to reside in the uppermost quintile," the cardiologist observed.
The SPDC study reveals that in Punjab 14 out of 34 districts are in the highest quintile and only one is in the lowest quintile.
This average, however, conceals large gaps: 90.8% of households in the top quintile (income deciles 9 and 10) owned at least one apartment, compared with 84.4% of households in the fourth quintile, 78% of households in the third quintile, 69.3% of households in the second quintile, and 53.7% of households in the bottom quintile.
The researchers calculate a measure for each college that they call its mobility rate, defined as the product of the percentage of students at the college who are drawn from the lowest quintile of income distribution and the percentage of those students who went on to careers that placed them in the top quintile of the distribution.
Because the PSID is a panel, we can see which quintile any family starts in and which quintile it ends up in.
The authors found that, in 2010, the 50-year-old men in the top income quintile could expect to live 38.8 more years, to 88.8 years.
And this rate generally holds for residents in the second and third quintiles. However, there is a three-percentage-point increase to 31% among fourth-quintile states and an even greater jump to 36% among the fifth quintile.