noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Abbreviation of octodecimo, a page size. abbreviation, alt-of, uncountable, usually
2. 2
   A book size octodecimo-sized pages. uncountable, usually

Synonyms

All synonyms

18ºeighteenmooctodecimott

Etymology

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

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.