quartile

The value of the boundary at the 25th, 50th, or 75th percentiles of a frequency distribution divided into four parts, each containing a quarter of the population.

In astrology, an aspect of planets when their longitudes differ by 90°. See aspect, 7.

That point on a frequency-curve above or below which one fourth of the total number of cases are found.

Involving an angular distance of 90°.

Same as quadrate.

Any of the three points that divide an ordered distribution into four parts, each containing a quarter of the population.

Any one of the four groups so divided.

(statistics) any of three points that divide an ordered distribution into four parts each containing one quarter of the scores