plural folios
Definition of folio
(Entry 1 of 2)
1a
: a leaf especially of a manuscript or book
b
: a leaf number
c
: a page number
d
: an identifying reference in accounting used in posting
2a
: a sheet of paper folded once
b
: a case or folder for loose papers
3a
: the size of a piece of paper cut two from a sheet
also
: paper or a page of this size
b
: a book printed on folio pages
c
: a book of the largest size
4
: a certain number of words taken as a unit or division in a document for purposes of measurement or reference
folio
verb
folioed; folioing; folios
Definition of folio (Entry 2 of 2)
: to put a serial number on each leaf or page of
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Merriam-Webster unabridged
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Time Traveler for folio
The first known use of folio was in the 15th century
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