Infrared - Definition

adj 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"
n 1: the infrared region of the electromagnetic spectrum;
electromagnetic wave frequencies below the visible range;
"they could sense radiation in the infrared" [syn:
infrared, infrared frequency]
2: electromagnetic radiation with wavelengths longer than
visible light but shorter than radio waves [syn: infrared,
infrared light, infrared radiation, infrared emission]