electromagnetic spectrum

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 range of wavelengths of all known electromagnetic radiations extending from gamma rays through 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