WordReference Random House Unabridged Dictionary of American English © 2026
ra′dio spec′trum, 
  1. Physicsthe portion of the electromagnetic spectrum that includes radio waves.
  • 1925–30

Collins Concise English Dictionary © HarperCollins Publishers::
radio spectrum n
  1. the range of electromagnetic frequencies used in radio transmission, lying between 10 kilohertz and 300 000 megahertz
'radio spectrum' also found in these entries (note: many are not synonyms or translations):
radio - high frequency

Forum discussions with the word(s) "radio spectrum" in the title:


Look up "radio spectrum" at Merriam-Webster
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