A type of book format, where the full sheet of paper is only folded once. A full sheet of paper will have four "pages" of text, two "pages" on each side, which is then folded down the middle.
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The term for an early printed book, "in cunabulis (in the swaddling clothes) of the new-born art of printing." A book printed from the beginning of the invention of the printing press in the early 1440s until 1501.
The first words of a text. Before the development of titles and title pages, a text would be identified by its incipit. It is Latin for "it begins".
Meaning that the item was hand written, not created through mechanical printing (i.e. printing press).
A smaller, yet complete work. Usually bound in a soft cover.
Stretched and scraped goat or sheep's skin used for writing.
Rubrication is the use of red ink in some parts of a manuscript, as opposed to black ink. Primarily used to indicate a point of interest, a new paragraph, or a new section.
 Carter, "John Carter's ABC for Book Collectors," 122..
 Carter, "John Carter's ABC for Book Collectors," 147.