You searched for: “electric coronas
electric corona (s) (noun), electric coronas (pl)
A discharge of electricity appearing as a bluish-purple glow on the surface of and next to a conductor when the voltage gradient exceeds a certain critical value resulting from the ionization of the air in the area around the high voltage.
This entry is located in the following units: coron-, coroll- (page 1) electro-, electr-, electri- (page 7)