#trolleybus__trolley_coach__trolleycoach__trackless_trolley  a passenger bus with an electric motor that draws power from overhead wires
  supertype:  autobus__autobu__bus__coach__charabanc__double-decker__jitney__motorbus__motorcoach__omnibus__omnibu  a vehicle carrying many passengers; used for public transport; "he always rode the bus to work"
  part:  electric_motor  a motor that converts electricity to mechanical work
     part:  armature  coil in which voltage is induced by motion through a magnetic field
     part:  brush.electrical_device  conducts current between rotating and stationary parts of a generator or motor
     part:  field_magnet__fieldmagnet  a magnet that provides a magnetic field in a dynamo or electric motor
     part:  rotor_coil__rotorcoil__rotor  the rotating armature of a motor or generator
     part:  stator_coil__stator  mechanical device consisting of the stationary part of a motor or generator in or around which the rotor revolves

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