Pronunciation: (kär-tOOsh'),[key] —n. 1. Archit.a rounded, convex surface, usually surrounded with carved ornamental scrollwork, for receiving a painted or low-relief decoration, as an escutcheon.
2. an oval or oblong figure, as on ancient Egyptian monuments, enclosing characters that represent the name of a sovereign.
3. the case containing the inflammable materials in certain fireworks.
4. cartridge (def. 1).
5. a box for cartridges. Also,car•touch'.