radio wave

noun Electricity.
an electromagnetic wave having a wavelength between 1 millimeter and 30,000 meters, or a frequency between 10 kilohertz and 300,000 megahertz.

Origin:
1915–20

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Collins
World English Dictionary
radio wave
 
n
an electromagnetic wave of radio frequency

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
radio wave  
A very low frequency electromagnetic wave (from roughly 30 kilohertz to 100 gigahertz). Radio waves are used for the transmission of radio and television signals; the microwaves used in radar and microwave ovens are also radio waves. Many celestial objects, such as pulsars, emit radio waves. See more at electromagnetic spectrum.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Salt water can indeed burn when exposed to a certain kind of radio wave, a
  university chemist has confirmed.
Would be interesting to be able to detect infra-red, ultra-violet, radio wave.
We are currently exposed to a variety of radio wave technologies within our
  homes and as pointed out via our use of cell phones.
Radio wave pulses systematically probe small sections of tissues, knocking
  those atoms out of alignment.
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