4to

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|paper}} {{abbreviation of|en|quarto}}, a paper size.
2. {{lb|en|printing}} {{abbreviation of|en|quarto}}, a corresponding book size.

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