octodecimo

octodecimo

[ok-tuh-des-uh-moh]
noun, plural octodecimos for 2.
1.
a book size of about 4 × 6 1/4 inches (10 × 16 cm), determined by printing on sheets folded to form 18 leaves or 36 pages. Symbol: 18mo, 18°
2.
a book of this size.
adjective
3.
in octodecimo.
Also called eighteenmo.


Origin:
1855–60; short for Neo-Latin in octōdecimō in an eighteenth (of a sheet)

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World English Dictionary
octodecimo (ˌɒktəʊˈdɛsɪməʊ)
 
n , pl -mos
bookbinding another word for eighteenmo
 
[C18: from New Latin phrase in octodecimo in an eighteenth (of a whole sheet)]

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