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St. Elmo's fire definitions

WordNet (r) 3.0 (2005)

n
1: an electrical discharge accompanied by ionization of surrounding atmosphere [syn: corona discharge, corona, corposant, St. Elmo's fire, Saint Elmo's fire, Saint Elmo's light, Saint Ulmo's fire, Saint Ulmo's light, electric glow]

NOAA Weather Glossary

A luminous, and often audible, electric discharge thatis intermediate in nature between a spark discharge  and a point discharge (with itsdiffuse, quiescent, and non-luminous character). It occurs from objects, especiallypointed ones, when the electric field strength near their surfaces attains a value near100,000 volts per m. Aircraft flying through active electrical storms often develop coronadischarge streamers from antennas and propellers, and even from the entire fuselage andwing structure. It is seen also, during stormy weather, emanating from the yards and mastsof ships at sea.



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