Infra-red

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Infrared \In`fra*red"\, Infra-red \In`fra-red"\, a. [Infra- +
     red.]
     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.
        [PJC]
  
     3. affected by infrared radiation; as, infrared detector;
        infrared film.
        [PJC]

From WordNet (r) 2.0 [wn]:

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

From The Free On-line Dictionary of Computing (27 SEP 03) [foldoc]:

  infrared
       
           (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
          {docking stations}.
       
          (1997-01-30)