12mo

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|paper}} {{abbreviation of|en|duodecimo}}, a [[page]] [[size]] (5"-5.5" x 7.125"-7.5")
2. {{lb|en|printing}} A book size using duodecimo-sized pages.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.