quartile

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quartile

Astrology denoting an aspect of two heavenly bodies when their longitudes differ by 90?
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

quartile

[′kwȯr‚tīl]
(statistics)
The value of any of the three random variables which separate the frequency of a distribution into four equal parts.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.