Definition:
- (a.) Having four leaves to the sheet; of the form or size of a quarto.
- (n.) Originally, a book of the size of the fourth of sheet of printing paper; a size leaves; in present usage, a book of a square or nearly square form, and usually of large size.
Compare quarto with other words:
quarto vs. quartz
quarte vs. quarto
quart vs. quarto
foolscap vs. quarto