Octavo (abbreviated 8vo or 8°) is a technical term describing the format of a book, which refers to the size of leaves produced from folding a full sheet of paper on which multiple pages of text were printed to form the individual sections (or gatherings) of a book. An octavo is a book or pamphlet made up of one or more full sheets of paper on which 16 pages of text were printed, which were then folded three times to produce eight leaves.
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