| 1. | a rodlike conductor installed to divert lightning away from a structure by providing a direct path to the ground. |
| 2. | a person or thing that attracts and absorbs powerful and esp. negative or hostile feelings, opinions, etc., thereby diverting such feelings from other targets: The unpopular supervisor served as a lightning rod for the criticism that should have been aimed at management. |
| lightning rod n.
|
lightning rod
|
| lightning rod
A grounded metal rod placed high on a structure to conduct electrical current from a lightning strike directly to the ground, preventing the currents from injuring people or animals or from damaging objects. Lightning rods usually have a sharp, pointed tip, since electric lines of force are more highly concentrated around pointed objects, in this case increasing the attractiveness of the rod compared with other nearby objects. See also Saint Elmo's fire. |
lightning rod
metallic rod (usually copper) that protects a structure from lightning damage by intercepting flashes and guiding their currents into the ground. Because lightning tends to strike the highest object in the vicinity, rods are typically placed at the apex of a structure and along its ridges; they are connected to the ground by low-impedance cables. In the case of a building, the soil is used as the ground; on a ship, the water is used.
Learn more about lightning rod with a free trial on Britannica.com.