What do a.m. and p.m. stand for?

radio spectrum

the portion of the electromagnetic spectrum that includes radio waves.
Origin of radio spectrum
1925-30 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for radio spectrum
  • Historically, engineers have designed these chips to work within only a small range of frequencies in the radio spectrum.
  • Radio communications use radio waves at different frequencies, grouped within bands, that make up the radio spectrum.
  • As a basic plan for usage, the radio spectrum is allocated to various radio services in blocks of frequencies.
  • The genius of the cellular network is that it allowed much more efficient use of scarce radio spectrum.
  • Over the years, more users have elbowed their way onto the radio spectrum as new technologies arrive.
  • While demand for wireless data grows exponentially, the supply of available radio spectrum remains stubbornly fixed.
  • New ways to support more callers are needed because cellular-phone networks employ a finite resource: the radio spectrum.
  • All across the radio spectrum, right-wing shock jocks are themselves shocked.
  • Both connect gadgets cheaply by accessing a swath of free radio spectrum over which to exchange digital data.
  • It sounds great in theory because it would maximize use of radio spectrum, which is a limited resource.
British Dictionary definitions for radio spectrum

radio spectrum

the range of electromagnetic frequencies used in radio transmission, lying between 10 kilohertz and 300 000 megahertz
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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