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Meaning of corona discharge

coro'na dis"charge

Pronunciation: [key]
— Elect. Elect.
  1. 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 calledCf. brush discharge.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.