- any of the values in a series dividing the distribution of the individuals in the series into four groups of equal frequency
- any of these groups
Origin of quartileMedieval Latin quartilis from Classical Latin quartus, fourth: see quart
- Any of the groups that result when a frequency distribution is divided into four groups of equal size.
- Any of the values that separate each of these groups.
Origin of quartileMiddle English 90 degrees apart (of the relative position of two celestial bodies) from Old French quartil from Medieval Latin quārtīlis of a quartile from Latin quārtus fourth ; see quart .