Folio
/ˈfoʊ.li.oʊ/noun
A large sheet of paper folded once to make two leaves, or a book made of such sheets.
Did you know?Folio comes from the Latin *folium* (“leaf”), the same root behind *foliage* and *defoliate*, because early books were literally imagined as leaves gathered into a tree of pages.
Etymological Timeline
Proto-Indo-European
PIE
*bʰel-
“to thrive, bloom, or flourish”
Latin
Latin
folium
“leaf”
Late Latin
Latin
folium
“leaf; sheet of paper”
16th Century
English
folio
“a sheet folded once; a page or leaf of a book”
Modern English
English
folio
“a large book format or a leaf/page in a book”