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infrared

From Wiktionary, the free dictionary
See also:infra-red

English

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Etymology

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Frominfra- +‎red.

Pronunciation

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Noun

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infrared (countable anduncountable,pluralinfrareds)

  1. (uncountable) Theelectromagneticradiation of awavelength longer thanvisible light, but shorter thanmicrowave radiation, having a wavelength between 700nm and 1 mm.
    Hypernym:electromagnetic radiation
    • 1962, John Nelson Howard,Transmission of the Atmosphere in the Infrared: A Review, page 3:
      Collisions of these 'transparent' molecules with the molecules that do have absorption bands in theinfrared can have a considerable influence on the intensities of the observed absorption bands.
  2. (countable) A specificwavelength in this range.
    • 1924,The American Review of Tuberculosis, page110:
      Sonne has shown that by means of the luminous rays the temperature in the tissue may be raised to a higher degree than by the use of theinfrareds.
    • 2009, Alexander Grankov,Microwave Radiation of the Ocean-Atmosphere: Boundary Heat and Dynamic Interaction:
      Exposure of spectral pieces at centimeters, millimeters, andinfrareds, which provide a top steadiness of the dependence "MCW radiation vs. parameter Δt" and its interannual (seasonal) dynamics.
  3. (countable) A device that emits infrared radiation.
    • 2000, Pete Fowler,Keeps, page62:
      In his room, he could install hisinfrareds without being discovered.
    • 2007, Ed Morawski,Solving the Security Puzzle, page79:
      Beams are the active counterparts of passiveinfrareds (PIRs). Since these are active infrareds, they require two parts: a transmitter and a receiver.
    • 2020, Jenny Dorsey,The Infrared Grill Master: Recipes and Techniques for Perfectly Seared, Deliciously Smokey BBQ Every Time:
      Additionally,infrareds tend to cook food faster so there's less time to render said fat.

Translations

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radiation of a wavelength between 700 nm and 1 mm

Adjective

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infrared (notcomparable)

  1. Having awavelength in the infraredspectrum.
    Hyponyms:mid-infrared,near-infrared
  2. (figurative, physics) Relating to very lowenergies or very largedistances ortime spans.
    Antonym:ultraviolet
    • 1986,Luis Álvarez-Gaumé, “An Introduction to Anomalies”, in G. Velo,A. S. Wightman, editors,Fundamental Problems of Gauge Field Theory,→ISBN,page97:
      Unless otherwise stated, we will be working in Euclidean space compactified to a sphere in order to avoidinfrared problems.
    • 2000, Andreas Galka,Topics in Nonlinear Time Series Analysis: With Implications for EEG Analysis,→ISBN,page176:
      Secondly, as stated already by Osborne & Provenzale, purek-behaviour is impossible since there would have to be infinite power at zero frequency (this would correspond to aninfrared catastrophe).
    • 2010, Taizo Muta,Foundations of Quantum Chromodynamics: An Introduction to Perturbative Methods in Gauge Theories, 3rd edition,→ISBN,page331:
      Althoughinfrared divergences are of long-distance nature, they often play an essential role in the verification of the validity of the perturbative treatment of short-distance phenomena.

Derived terms

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Translations

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having the wavelength in the infrared

Further reading

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