| 1. |
(satellite 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" |
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| 2. |
(noun) the infrared part of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range; "they could sense radiation in the infrared" |
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Synonyms: infrared frequency |
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Related Words: frequence, frequency, oftenness |
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| 3. |
(noun) electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves |
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Synonyms: infrared emission, infrared light, infrared radiation |
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Related Words: actinic radiation, actinic ray |
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