folios

noun

1. 1.A leaf of a book or manuscript
2. 2.A page of a book, that is, one side of a leaf of a book.
3. 3.A page number. The even folios are on the left-hand pages and the odd folios on the right-hand pages.
4. 4.A sheet of paper folded in half.
5. 5.(books) A book made of sheets of paper each folded in half (two leaves or four pages to the sheet); hence, a book of the largest kind, exceeding 30 cm in height.