far-infrared radiation

[ fahr-in-fruh-red ]
/ ˈfɑr ɪn frəˈrɛd /

noun

the longer wavelengths of electromagnetic radiation in the infrared region of the spectrum, beyond the red end of the visible spectrum, from 50 to 1000 micrometers. Abbreviation: FIR

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Also called far-red radiation [fahr-red] /ˈfɑrˈrɛd/.

Words nearby far-infrared radiation

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Scientific definitions for far-infrared radiation

far-infrared radiation
[ färĭn′frə-rĕd ]

Infrared electromagnetic radiation of very long wavelengths, in the range of 2-50 microns. It is used in medicine to provide a penetrating heat to the body. Also called far-red radiation
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.