slipcase

[ slip-keys ]
/ ˈslɪpˌkeɪs /

noun

a box for a book or set of books, open on one side so that the spine is visible.

Origin of slipcase

First recorded in 1920–25; slip1 + case2

British Dictionary definitions for slipcase

slipcase
/ (ˈslɪpˌkeɪs) /

noun

a protective case for a book or set of books that is open at one end so that only the spines of the books are visible