BROUGHAM
brougham
(noun) a sedan that has no roof over the driver’s seat
brougham
(noun) light carriage; pulled by a single horse
Source: WordNet® 3.1
Etymology
Named from Henry Peter, Lord Brougham (1778–1868), who either invented or popularized the vehicle.
Noun
brougham (plural broughams)
A four-wheeled horse-drawn carriage, designed in 1839. It had an open seat for the driver in front of the closed cabin for two or four passengers.
An automobile, a sedan without a roof over the driver's seat.
Source: Wiktionary
Brough"am, n.
Definition: A light, close carriage, with seats inside for two or four, and
the fore wheels so arranged as to turn short.
Source: Webster’s Unabridged Dictionary 1913 Edition