boards : Common term for the covers of a hardbound book.

8vo : Short for Octavo, A book whose page size is approximately 8-10 inches tall. The size is based on a sheet of paper 25 inches by 38 inches, the size of paper traditionally used by book printers, which has been folded and cut into 16 pages.. Unfortunately often misunderstood to mean 8 volumes.

soiling : Generally refers to minor discoloration or staining.

facsimile : An exact copy of an original work.

Cloth : Generally refers to a hardcover with cloth covering the outside of the book covers.

shelfwear : Minor wear resulting from a book being place on, and taken from a bookshelf, especially along the bottom edge.