slip case

plural slip cases · alternative slip-case

1. A removable protective covering for a book etc

   2003 Miriam A. Drake - Encyclopedia of Library and Information Science If a noble book suggests the need of a noble binding, consider a chemise inserted into a tastefully decorated slip case, leaving the book in its original state.

   1 more example

   for, if there should appear a pocket-book, which may be drawn up by a riband from its slip case . . . the child would seize upon these with delight.

   1835, Maria Edgeworth, Richard Lovell Edgeworth, Practical Education