The Collaborative International Dictionary
Infrared Radiation \In`fra*red" Ra`di*a"tion\, n. [Infra- + red.] (Physics) electromagnetic radiation having a wavelength of between 700 nanometers and 1 millimeter.
Note: Infrared radiation is that electromagnetic radiation lying between the visible spectrum and the longest microwaves. It may be absorbed by matter in a manner specific to the absorbing substance, causing increased vibration of molecules. The infrared absorption spectrum of a chemical compound is often very specific, and the infrared absorption spectrum is therefore used to help identify chemical substances. Infrared radiation is used in certain communication devices, such as television remote controls and communication devices between computers or between computers and peripherals.
Wiktionary
n. (context physics English) electromagnetic radiation having a wavelength approximately between 1 micrometre and 1 millimetre; perceived as heat.
WordNet
n. electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves [syn: infrared, infrared light, infrared emission]
Usage examples of "infrared radiation".
Rattlesnakes and doped semiconductors detect infrared radiation perfectly well.
And the infrared radiation getting through the dust clouds keeps increasing the farther in we travel, especially at the wavelengths associated with star formation.
When you take the temperature of this world from the infrared radiation it emits, you find that most latitudes are above the freezing point of water, while the polar caps are below freezing.
The exterior of the Dyson sphere radiates infrared radiation into space.
The amount of infrared radiation leaving the finned coolers had to exceed the few photons coming in in order for the temperature of the helium to drop far enough.
The planet is pouring infrared radiation out into space in great quantities because it is massive enough to be almost red-hot.
Jeffer didn't react to the insult, barring an increase in infrared radiation from his cheeks, neck, and ears.
Both the unit on which Scotty was working and Rick's new project allowed night vision by infrared radiation, but the two worked on different principles.
Detectors the Marines carried showed them the locations of mines, both antipersonnel and antivehicle, that were buried just under the surface of the ground between the forested hillsides and the trench, as well as a variety of telltales to detect infrared radiation and motion.