tricycle
n.
1828, "three-wheeled horse-drawn carriage," from French tricycle (1827); see tri- + cycle, n.. The pedal-powered version is first attested 1868.
〔李〕[tri-=three三；cycl=circle圆圈；-e →“three circles or wheels三个轮子”→] n.a vehicle having three wheels三轮车；三轮摩托车
〔蒋〕[tri三，cycl轮] 三轮脚踏车，三轮摩托车