Dictionary  coro'na dis"chargeElect. 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.
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