[trahy-si-kuh
l, -sik-uhl] 
| 1. | a vehicle, esp. one for children, having one large front wheel and two small rear wheels, propelled by foot pedals. |
| 2. | a velocipede with three wheels propelled by pedals or hand levers. |
| 3. | a three-wheeled motorcycle. |
| tri·cy·cle (trī'sĭk'əl, -sĭ-kəl) n. A vehicle, used especially by small children, that has three wheels, one at the front and two at the back, and is usually propelled by pedals. [French : tri-, three (from Greek tri-; see tri-) + Greek kuklos, wheel; see cycle.] |