The Quadricycle was an early form of automobile. Earliest models were propelled by a small steam engine, then designers switched to early internal combustion engines as they became available. The word is derived from the fact that it had four wheels and used a lot of technology from the bicycles of the era.
Additional motorized four-wheelers:
Quadricycle, quadracycle, quadcycle, quadrocycle and quad all refer to vehicles with four wheels. More specifically these terms may refer to: