folio

US /ˈfoʊ.li.oʊ/
UK /ˈfoʊ.li.oʊ/
"folio" picture
1.

folio, feuillet

a leaf of a manuscript or book, numbered only on the front (recto) side

:
The ancient manuscript had several missing folios.
L'ancien manuscrit avait plusieurs folios manquants.
Each folio was carefully preserved to prevent damage.
Chaque folio était soigneusement conservé pour éviter les dommages.
2.

in-folio, grand livre

a book or manuscript of the largest size, made from sheets of paper folded once

:
The library acquired a rare first edition folio.
La bibliothèque a acquis un rare in-folio de première édition.
Shakespeare's First Folio is a collection of his plays.
Le Premier Folio de Shakespeare est un recueil de ses pièces.