Word.ws English Dictionary

18mo

18mo noun: a book size octodecimo-sized pages. Also the abbreviation of octodecimo.

Noun

18mo (usually uncountable, plural 18mos)

  1. (usually) A book size octodecimo-sized pages.
    Synonyms:
    18º, eighteenmo, octodecimo, T

Also used as

18mo is also the abbreviation of octodecimo.

Synonyms of 18mo

Forms of 18mo

plural18mos

Origin of 18mo

18 + -mo, for an eighteenth of a sheet.

Questions about 18mo

What does 18mo mean?
18mo means a book size octodecimo-sized pages.
What part of speech is 18mo?
18mo is a noun.
What is the plural of 18mo?
The plural of 18mo is 18mos.

Words near 18mo in the dictionary

  1. 187
  2. 1870s
  3. 1880s
  4. 1890s
  5. 18C
  6. 18mo
  7. 18mos
  8. 18s
  9. 18th
  10. 18ᵗʰ
  11. 19

Source and license

Adapted from Wiktionary: 18mo (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “18mo.” Word.ws, https://word.ws/18mo. Based on Wiktionary, CC BY-SA 4.0.