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lightning conductor, rod
a metal strip terminating in a series of sharp points, attached to the highest part of a building, etc., to discharge the electric field before it can reach a dangerous level and cause a lightning strike
A metal device that leads an electrical charge from a strike by lightning safely to the ground; typically a braided copper wire connected to a lightning rod on the roof and grounded to a water pipe or other underground metal conductor.
lightning conductor[′līt·niŋ kən‚dək·tər]
A conductor designed to carry the current of a lightning discharge from a lightning rod to ground.
lightning conductor, lightning rod
A metallic cable or rod, running from the highest point on the roof of a building (and insulated from it) to the ground; protects the building, should lightning strike, by providing a direct path to ground.