This word appeared in Dracula as calèche, which looks nicer, but this definition is much fuller.

ca·lash /kəˈlæʃ/
1. Also, calèche. a light vehicle pulled by one or two horses, seating two to four passengers, and having two or four wheels, a seat for a driver on a splashboard, and sometimes a folding top.
2. a folding top of a carriage.
3. calèche (def. 1).
4. a bonnet that folds back like the top of a calash, worn by women in the 18th century.

[Origin: 1660-70; < F calèche < G Kalesche < Czech kolesa carriage, lit., wheels; see wheel]