IPA: /ˈslɪpkeɪst/
KK: /ˈslɪpkeɪst/
Describing a book or item that is protected or presented in a special box or cover called a slipcase.
The collector proudly displayed his slipcased edition of the classic novel on the shelf.
Slipcased → It is formed from "slip" (from Old English *slipan*, meaning to slide or glide) and "case" (from Latin *capsa*, meaning a box or container) with the suffix "-ed" (indicating a past participle). The word "slipcased" refers to an item that is contained within a sliding or gliding case.
Think of something that 'slides' ('slip') into a 'box' ('case') — that's why slipcased means it fits into a sliding container.