infrared
adjective
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
- infrared light
noun
1. the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
- they could sense radiation in the infrared
Definition categories: attribute, frequence, frequency, oftenness
2. electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
Definition categories: phenomenon