1.
tricycle
A three-wheeled vehicle, typically a small pedal-powered vehicle for young children, or a three-wheeled motorized vehicle.
A compound of 三 (three), 輪 (wheel), and 車 (vehicle). Follows the same pattern as 自転車 (bicycle) and 二輪車 (two-wheeled vehicle/motorcycle).
Usage
Most commonly refers to children's pedal tricycles. Can also refer to three-wheeled motorized vehicles, which were common in Japan during the postwar era for deliveries.