Dictionary
coro'na dis"charge
Elect.
a discharge, frequently luminous, at the surface of a conductor or between two conductors of the same transmission line, accompanied by ionization of the surrounding atmosphere and often by a power loss. Also called
corona, electric glow, St. Elmo's fire. Cf.
brush discharge.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.