Quadricycle

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 technology derived 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:

Quadricycle, with an i, was a popular term for human or motorized four wheel bike-like vehicles around the turn of the 19th to 20th century