elve

elve

[elv]
noun
an extremely dim, flattened, expanding, reddish glow briefly seen over a thunderstorm, due to electromagnetic pulses from intense lightning.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To elve
American Heritage
Science Dictionary
elve   (ělv)  Pronunciation Key 
An extremely dim, short-lived, expanding disk of reddish light above thunderstorms, believed to be caused by electromagnetic pulses from intense lightning in the lower ionosphere. Elves last less than a second and can be as wide as 500 km (310 mi) in diameter.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature