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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"

1. The infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
   "they could sense radiation in the infrared"; "they could sense radiation in the infrared frequency"
   - infrared frequency
    
2. Electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
   - infrared light, infrared radiation, infrared emission

Derived forms: infrareds

See also: invisible, unseeable

Type of: actinic radiation, actinic ray, frequence, frequency, oftenness

Part of: infrared spectrum

Encyclopedia: Infrared