lightning arrester

noun

1. a device for preventing damage to radio, telephonic, or other electric equipment from lightning or other high-voltage currents, using spark gaps to carry the current to the ground without passing through the device.

lightning arrester

noun

1. a device that protects electrical equipment, such as an aerial, from an excessive voltage resulting from a lightning discharge or other accidental electric surge, by discharging it to earth

Word History and Origins

Origin of lightning arrester¹

First recorded in 1855–60