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1. (n.) infrared
the part of the invisible spectrum that is contiguous to the red end of the visible spectrum and that comprises electromagnetic radiation of wavelengths from 800 nm to 1 mm.
2. (adj.) infrared
of, pertaining to, or using the infrared or its component rays: infrared radiation.
Etymology: (1825–35)
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| Definition of 'infrared' |
Princeton's WordNet |
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1. (noun) infrared, infrared frequency
the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
"they could sense radiation in the infrared"
2. (adj) infrared, infrared light, infrared radiation, infrared emission
electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
3. (adj) infrared
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"
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| Alternative search options for 'infrared' |
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Definitions of infrared 
