conductor -
a device designed to transmit electricity, heat, etc.
device any clever maneuver; "he would stoop to any device to win a point"; "it was a great sales gimmick"; "a cheap promotions gimmick for greedy businessmen"
busbar,
bus an electrical conductor that makes a common connection between several circuits; "the busbar in this computer can transmit data either way between any two components of the system"
electric cord,
cord a line made of twisted fibers or threads; "the bundle was tied with a cord"
electrode a conductor used to make electrical contact with some part of a circuit
heat sink a metal conductor specially designed to conduct (and radiate) heat
lightning conductor,
lightning rod a metallic conductor that is attached to a high point and leads to the ground; protects the building from destruction by lightning