from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The entire range of electromagnetic radiation, which includes, in order of increasing frequency and decreasing wavelength, radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, x-rays, and gamma rays.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics The entire
rangeof wavelengthsof all known electromagnetic radiationsextending from gamma raysthrough visible light, infrared, and radio waves, to X-rays.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the entire frequency range of electromagnetic waves
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