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shortwave

[shawrt-weyv] /ˈʃɔrtˈweɪv/
noun
1.
Electricity. a radio wave, shorter than that used in AM broadcasting, corresponding to frequencies of over 1600 kilohertz: used for long-distance reception or transmission.
3.
Physics. a wave of electromagnetic radiation equal in length to, or shorter than, the wavelength of visible light.
adjective
4.
of, pertaining to, or using shortwaves.
verb (used with object), verb (used without object), shortwaved, shortwaving.
5.
to transmit by shortwaves.
Origin
1900-1905
1900-05; short + wave
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Word Origin and History for short-wave
adj.

in reference to radio wavelength less than c.100 meters, 1907, from short (adj.) + wave (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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short-wave in Science
shortwave
  (shôrt'wāv')   
A radio wave with a frequency between 5.9 megahertz and 26.1 megahertz. Shortwaves broadcast from the Earth's surface are reflected by the upper atmosphere and can travel great distances around the planet. The shortwave band of the electromagnetic spectrum is used for amateur radio communications.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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