microwave spectrum

noun Electronics.
a spectrum of electromagnetic radiations whose wavelengths fall in the microwave range.

Origin:
1945–50

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
The sauna is supposed to emit radiation in the infrared part of the spectrum, which adjoins the microwave spectrum.
Today our planet shines brighter than the sun in the microwave spectrum.
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