rubbing : Abrasion or wear to the surface. Usually used in reference to a book's boards or dust-jacket.

remainder mark : Usually an ink marking of some sort which indicates that the book was designated a remainder. In most cases, it can be found on the edges of the text block in the form of a marker stripe or a stamp of some sort.

Remainder marks considerably lower the overall collectibility of a title, although, in some cases, they are acceptable to a collector.

ffep : Front free endpaper. Generally, the first page of a book.