Trolley
a word originating in England applied at first to a handcart and afterward to a truck. In the United States, a trolley means a pulley running on an overhead wire. In electric railways this pulley is at the top of a long rod that acts as a conductor to transmit the electric current to the motor of a street car. By extension, the word trolley is applied to the car and to the system as a whole.
See STREET RAILWAYS.
ANTHONY TROLLOPE