Science Dictionary
atmospherics   (āt'mə-sfîr'ĭks)  Pronunciation Key 
  1. Electromagnetic radiation that is in the same range as radio frequencies and is produced by natural phenomena (such as lightning) and interferes with radio communications.

  2. The radio interference produced by this electromagnetic radiation.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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