Pronunciation: (vu-los'u-pēd"), [key]
1. a vehicle, usually having two or three wheels, that is propelled by the rider.
2. an early kind of bicycle or tricycle.
3. a light, three-wheeled, pedal-driven vehicle for railway inspection, used for carrying one person on a railroad track.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.