from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An electromagnetic wave within the range of radio frequencies.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. electromagnetic radiation having a wavelength between about .5 centimeters and 30,000 meters; used for the broadcasting of radio and television signals.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m


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