12mo

noun

Definitions

Noun
  1. 1
    Abbreviation of duodecimo, a page size (5"-5.5" x 7.125"-7.5") abbreviation, alt-of, uncountable, usually
  2. 2
    A book size using duodecimo-sized pages. uncountable, usually

Etymology

12 + -mo, for a twelfth of a sheet.

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