quartile
— Noun
– English
~ (statistics) any of three points that divide an ordered distribution into four parts each containing one quarter of the scores
quarto
— Noun
– English
~ the size of a book whose pages are made by folding a sheet of paper twice to form four leaves
quartz
— Noun
– English
~ a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities