Where does “quarto” come from?

Quarto comes from Latin quartus, from Latin quattuor, from Latin caput, from Proto-Indo-European kauput-, ultimately from Proto-Indo-European kapōlo.

quarto (English): A size of paper (7.5"-10" x 10"-12.5" or 190-254 x 254-312 mm). Formed by folding and cutting one of several standard sizes of paper (15"-20" x 20"-25" or 381-508 x 508-635 mm) twice to form 4 leaves (eight sides)

Definitions

  1. A size of paper (7.5"-10" x 10"-12.5" or 190-254 x 254-312 mm). Formed by folding and cutting one of several standard sizes of paper (15"-20" x 20"-25" or 381-508 x 508-635 mm) twice to form 4 leaves (eight sides)

Ancestry of “quarto”, step by step

StepLanguageWordMeaning
1Latinquārtusfourth
2Proto-Indo-Europeankʷeturtos—
3Proto-Indo-Europeankʷetwóresfour
4Proto-Indo-Europeankʷe-and
Every word from Proto-Indo-European kʷe- →Every word from Proto-Indo-European kʷetwóres →Every word from Proto-Indo-European kʷeturtos →