Synonyms of infrared

Noun

1. infrared, infrared frequency, frequency, frequence, oftenness

usage: the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range; "they could sense radiation in the infrared"

2. infrared, infrared light, infrared radiation, infrared emission, actinic radiation, actinic ray

usage: electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves

Adjective

1. infrared, invisible (vs. visible), unseeable

usage: 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"

Definition and meaning of infrared (Dictionary)