mortise lock
A mortise lock (also spelled mortice lock in British English) is a lock that requires a pocket—the mortise—to be cut into the edge of the door or piece of furniture into which the lock is to be fitted.
en-US/ˈmoʊɹtɪs ˈlɑk/
en-GB/ˈmɔːtaɪz ˈlɒk/