1. The collective fold-areas sections of a
gathered book after sewing. Sometimes called
"back." 2. That part of the covering material of a
book which covers the folds of the sections of a
book and which is the part usually visible as it
stands on the shelf. It generally bears the title,
author, name of the publisher (when an edition
binding), and (in a library) frequently a location
(classification) number, or a symbol of some kind.
Also called "back," "backbone," or "shelfback."
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