First Known Use: 1589
Dictionary
quarto
noun quar·to \ˈkwȯr-(ˌ)tō\
plural quartos
Definition of QUARTO
1
: the size of a piece of paper cut four from a sheet; also : paper or a page of this size
2
: a book printed on quarto pages
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Origin of QUARTO
Latin, abl. of quartus fourth
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