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. Electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
   "Night vision goggles detect infrared radiation emitted by warm objects"; "The scientists used infrared emission data to study the temperature of distant stars";
   - infrared light, infrared radiation, infrared emission
    
2. The infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
   "they could sense radiation in the infrared";
   - infrared frequency

Derived forms: infrareds

See also: invisible, unseeable

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

Part of: infrared spectrum

Encyclopedia: Infrared