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a suffix occurring in a series of compounds that describe book sizes according to the number of leaves formed by the folding of a single sheet of paper:
Origin of -mo
combining form extracted from duodecimo Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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British Dictionary definitions for -mo


(in bookbinding) indicating book size by specifying the number of leaves formed by folding one sheet of paper: 12mo, twelvemo, or duodecimo, 16mo or sixteenmo
Word Origin
abstracted from duodecimo
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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