- Also called twelvemo. a book size of about 5 × 7½ inches (13 × 19 cm), determined by printing on sheets folded to form 12 leaves or 24 pages. Symbol: 12 mo, 12°
- a book of this size.
- in duodecimo; twelvemo.
Origin of duodecimo
Examples from the Web for duodecimo
It was in the duodecimo form, and consisted of about three hundred pages.
Of Lintotts first duodecimo edition 2500 copies were quickly sold off.Prices of Books
Henry B. Wheatley
The sizes of books had not yet all come to octavo or duodecimo.The Printed Book
Were it not for the riff-raff, that place would be a paradise in duodecimo.A Transient Guest
Her works have been published in eighty-four volumes, duodecimo.Lives of Celebrated Women
Samuel Griswold Goodrich
- Also called: twelvemo a book size resulting from folding a sheet of paper into twelve leavesOften written: 12mo, 12°
- a book of this size
Word Origin and History for duodecimo
1650s, from Latin in duodecimo (folded) "in a twelfth" of a sheet, from ablative of duodecimus "twelfth," from duodecim (see dozen). Often abbreviated 12mo.; a book in which each page is the twelfth part of the printer's sheet.