BUCKBOARD
buckboard
(noun) an open horse-drawn carriage with four wheels; has a seat attached to a flexible board between the two axles
Source: WordNet® 3.1
Etymology
Noun
buckboard (plural buckboards)
A simple, distinctively American four-wheeled horse-drawn wagon designed for personal transport as well as for transporting animal fodder and domestic goods, often with a spring-mounted seat for the driver.
Source: Wiktionary
Buck"board`, n.
Definition: A four-wheeled vehicle, having a long elastic board or frame
resting on the bolsters or axletrees, and a seat or seats placed
transversely upon it; -- called also buck wagon.
Source: Webster’s Unabridged Dictionary 1913 Edition