INFRARED
infrared
(adjective) 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”
infrared, infrared frequency
(noun) the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range; “they could sense radiation in the infrared”
infrared, infrared light, infrared radiation, infrared emission
(noun) electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
Source: WordNet® 3.1
Etymology
Noun
infrared (countable and uncountable, plural infrareds)
electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm
Hypernyms
• electromagnetic radiation
Adjective
infrared (not comparable)
Having the wavelength in the infrared.
In the infrared spectrum.
Hyponyms
• mid-infrared
• near-infrared
Source: Wiktionary
In`fra-red", a. [Infra- + red.] (Physics)
Definition: Lying outside the visible spectrum at its red end; -- said of rays less refrangible than the extreme red rays.
Source: Webster’s Unabridged Dictionary 1913 Edition
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