[syn: infrared, infrared light, infrared radiation, infrared emission]
1. having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end;
- Example: "infrared radiation"
- Example: "infrared photography"
The Collaborative International Dictionary of English v.0.48:
Infrared \In`fra*red"\, Infra-red \In`fra-red"\, a. [Infra- +
1. (Physics) Lying outside the visible spectrum at its red
end; -- said of rays having a longer wavelength (and thus
less refrangible) than the extreme red rays, specifically
those electromagnetic waves having a wavelength of between
700 nanometers and 1 millimeter.
[Webster 1913 Suppl. +PJC]
2. relating to, using, or producing infrared radiation.
3. affected by infrared radiation; as, infrared detector;
WordNet (r) 3.0 (2006):
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
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]
The Free On-line Dictionary of Computing (18 March 2015):
(IR) Electromagnetic waves in the frequency
range just below visible light corresponding to radiated heat.
IR waves can be generated by a kind of LED and are often
used for remote controls for televisions etc. and in some