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

radio beam

beam (def 12).
Origin of radio beam
1920-25 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for radio beam
  • Ie, the radio beam goes out in a horizontal direction is the aerial is vertically orientated.
  • Directional radio beam transmitters are installed on the bridge and aimed toward the center of the channel.
  • Another type that was tried experimentally was the low-frequency radio beam.
  • There will be a plasma screen with a high tech radio beam that goes out to the island.
  • Uses a radio beam that is part of the machine control circuit.
British Dictionary definitions for radio beam

radio beam

a narrow beam of radio signals transmitted by a radio or radar beacon, radio telescope, or some other directional aerial, used for communications, navigation, etc Sometimes shortened to beam
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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