octodecimo
noun 2
Definitions
noun
1
A size of a sheet of paper resulting from folding and cutting a sheet of paper into eighteenths (3.5"–4.5" x 4.9"–5.9").
2
A book consisting of pages of that size.
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noun
A size of a sheet of paper resulting from folding and cutting a sheet of paper into eighteenths (3.5"–4.5" x 4.9"–5.9").
A book consisting of pages of that size.