Having four (quarto) leaves to the sheet.
The page size of a book made up of sheets each of which is folded twice to form four leaves, or eight pages, about nine by twelve inches in size.
A book made of pages folded in this way.
The page size obtained by folding a whole sheet into four leaves.
A book composed of pages of this size.
(paper) A size of paper (7.5"-10" x 10"-12.5")(190-254 x 254-312 mm). Formed by folding and cutting one of several standard sizes of paper (15"-20" x 20"-25")(381-508 x 508-635 mm) twice to form 4 leaves (eight sides).
- (UK) Quarto writing paper (10 inches x 8 inches).
(printing) A book size, corresponding to the paper size.
Origin of quarto
Short for Middle English (in) quarto (in) the fourth part (of a sheet) from Medieval Latin (in) quārtō from Latin ablative of quārtus fourth kwetwer- in Indo-European roots