Definition of octodecimo Octodecimo
oc•to•dec•i•mo
We found 5 definitions of octodecimo from 3 different sources.
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What does octodecimo mean?
Wiktionary 
- octodecimo (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". - octodecimo (Noun)
A book consisting of pages of that size.
Webster DictionaryWebster's Unabridged Dictionary 📘
- octodecimo (a.)
Having eighteen leaves to a sheet; as, an octodecimo form, book, leaf, size, etc. - octodecimo (n.)
A book composed of sheets each of which is folded into eighteen leaves; hence; indicating more or less definitely a size of book, whose sheets are so folded; -- usually written 18mo or 18¡, and called eighteenmo.
Chambers DictionaryChamber's 20th Century Dictionary 📕
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octodecimo
ok-tō-des′i-mō, adj. having eighteen leaves to the sheet, contracted 18mo.—adj. Octodec′imal (crystal.), having eighteen faces. [L. octodecim, eighteen—octo, eight, decem, ten.]
