Bookbinding and the Conservation of books 
A dictionary of descriptive terminology.
http://palimpsest.stanford.edu/don/don.htmlIndependent Online Booksellers Association - Glossary of Book Terms
Book terminology.
http://www.ioba.org/terms.html
Independent Online Booksellers Association - Book Condition Description Terminology
Description definitions.
http://www.ioba.org/desc.html
Abebooks Glossary
Lists explanations of abbreviations and terms related to books.
http://www.abebooks.com/docs/HelpCentral/RoboHelp/bookbuyerhelp/Features_of_Abebooks/Abebooks_Glossary.htm
Alibris: Glossary of Book Terms
The first half of the glossary contains terms A-Z and is followed by two book anatomy illustrations, descriptions of the various book sizes, a guide to condition ratings, and the most common abbreviations used in the world of books.
http://www.alibris.com/glossary/glossary.cfm
Book Collectors' Glossary
Cross-referenced glossary of book collecting terms.
http://www.tappinbookmine.com/glosdefn.htm
