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sferic

American  
[sfeer-ik, sfer-ik] / ˈsfɪər ɪk, ˈsfɛr ɪk /

noun

plural

sferics
  1. a brief emission of electromagnetic radiation produced by lightning.


sferic Scientific  
/ sfîrĭk,sfĕr- /
  1. A radio emission from a stroke of lightning.