Codex
A codex (the plural is codices) is the name bibliographers give to the format of
virtually all modern books: a series of sheets folded and bound
together so as to produce separate pages. The codex first
appeared around ??? C.E., and offered
several advantages over the scroll, not least that it was
possible to jump easily from one part of a book to another.
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From the Guide to Literary Terms by Jack Lynch.
Please send comments to jlynch@andromeda.rutgers.edu.
Note: This guide is still in the early stages of development. Bear with me.