(twelvmo), English reading of the abbreviation 12mo or XIImo for DUODECIMO. Also attrib.
1819. ‘R. Rabelais,’ Abeillard & Heloisa, 56. We stew them down for twelvemo use.
1835. J. Hannett, Bibliopegia, I. 12. The twelvemo also presents us with the eighteens, after the sheet is cut into three divisions.
1888. Jacobi, Printers’ Vocab., Twelvemo, a sheet of paper folded into twelve leaves, written thus—12 mo. Also called ‘duodecimo.’
1914. Chambers’ Jrnl., Jan., 7/2. Another French book … is a twelve-mo volume.
