Infrared
WordNet
adjective
(1) Having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end
"Infrared radiation"
"Infrared photography"
noun
(2) The infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
"They could sense radiation in the infrared"
(3) Electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
WiktionaryText
Noun
infrared
- electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm
Adjective
- Having the wavelength in the infrared.
- In the infrared spectrum.