far-infrared radiation

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


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

Nearby words

  1. far-and-near suture,
  2. far-famed,
  3. far-fetched,
  4. far-flung,
  5. far-gone,
  6. far-off,
  7. far-out,
  8. far-point,
  9. far-reaching,
  10. far-seeing

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Science 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.