trolleybus/'trɒlɪbʌs $ 'trɑː-/

n. a bus driven by power from electric wires above the street

n. [C] 无轨电车：The trolleybus is still a common form of transport in many European cities. 无轨电车在欧洲的许多城市仍是一种常见的交通方式。

构词trolley （手推车） + bus