quartile (plural quartiles)
- (statistics) Any of the three points that divide an ordered distribution into four parts, each containing a quarter of the population.
- (statistics) Any one of the four groups so divided.
- This school is ranked in the first quartile.
- (statistics): median (2-quantile), tercile/tertile (3), quartile (4), quintile (5), sextile (6), septile (7), octile (8), decile (10), hexadecile (16), ventile/vigintile (20), centile/percentile (100)
any of the three points
any of the four groups