from The Century Dictionary.

  • noun A size of book of which each signature is made up of 18 folded leaves, making 36 pages to the signature: commonly written 18mo.
  • Of the size of a sheet folded into eighteen leaves; consisting of such sheets: as, an eighteenmo page or book.

from the GNU version of the Collaborative International Dictionary of English.

  • See octodecimo.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun octodecimo (as a paper size in printing).


from The American Heritage® Dictionary of the English Language, 4th Edition

[From 18mo, abbr. of octodecimo.]


    Sorry, no example sentences found.


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