folio

OAB Definition

single sheet folded once into two, identically-sized leaves. May be single or in a gathering (section); bound or unbound.

 

Also refers to the size of a book made of large folios.

 

In the study of medieval manuscripts, the term folio refers to a leaf.

ABT Definition

Single sheets folded once. Folios are often combined into gatherings, which become signatures when sewn.

Linked Terms