sixteenmo
A book size produced by folding a sheet with four
right angle folds, giving a leaf size 1/16, the
size of the sheet and forming a section of 32
pages. For a full definition, the size of the
sheet must also be given. A sheet 25 by 38 inches
produces a book size (untrimmed) of 6 1/2 by 9 1/2
inches. Written as 16mo or 16 °. Also
called "sextodecimo."
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