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sky wave

noun

, Radio.
  1. a radio wave propagated upward from earth, whether reflected by the ionosphere or not.


sky wave

noun

  1. a radio wave reflected back to the earth by the ionosphere ( ionospheric wave ), permitting transmission around the curved surface of the earth Compare ground wave
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of sky wave1

First recorded in 1925–30

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