1. (n.) A folded sheet or leaf of a book or manuscript, or the book itself\;

2. (n.) A sheet of paper once folded.

3. (n.) A book made of sheets of paper each folded once (four ages to the sheet); hence, a book of the largest kind

4. (n.) The page number. The even folios are on the left-hand pages and the odd folios on the right-hand.

5. (n.) A page of a book; (Bookkeeping) a page in an account book; sometimes, two opposite pages bearing the same serial number.

6. (n.) A leaf containing a certain number of words, hence, a certain number of words in a writing, as in England, in law proceedings 72, and in chancery, 90; in New York, 100 words.

acknowledgments article back back matter bastard title best seller bibliography book book end book support book table book tray book truck bookcase bookholder bookrack bookrest bookshelf bookstack bookstand bound book catch line catchword chapter classic clause colophon coloring book contents contents page copyright page crown dedication definitive work duodecimo eighteenmo endleaf endpaper endsheet errata fascicle flyleaf folder fore edge foreword front matter gathering great work half-title page hardback head imperial imprint index inscription introduction juvenile juvenile book leaf limp-cover book magnum opus makeup medium nonbook notebook novel number octavo octodecimo opus opuscule opusculum page paperback paragraph passage phrase picture book playbook pocket book portfolio prayer book preface preliminaries production psalmbook psalter publication quarto recto reverso revolving bookcase royal running title section sentence serial sextodecimo sheet signature sixteenmo sketchbook soft-cover songbook stack standard work storybook subtitle super table of contents tail text title title page tome trade book trim size twelvemo type page verse verso volume work writing