I. ˈkwädrəˌsīkəl noun
Etymology: quadri- + -cycle (as in tricycle )
1. : a four-wheeled cycle or velocipede for pedal propulsion on roads or railroads
2. : a motor vehicle with a live two-wheeled axle, a bicycle seat for the driver, and a two-wheeled forecarriage steered by handlebars
II. adjective
: four-wheeled
a quadricycle landing gear