infrared

See also: infra-red

English

Etymology

From infra- +‎ red.

Pronunciation

• IPA^(key): /ɪnfɹəˈɹɛd/

• Audio (Southern England):

  (file)

Noun

infrared (countable and uncountable, plural infrareds)

1. (uncountable) The electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm 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 the infrared can have a considerable influence on the intensities of the observed absorption bands.

2. (countable) A specific wavelength in this range.
   • 1924, The American Review of Tuberculosis, page 110:

     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 the infrareds.

   • 2009, Alexander Grankov, Microwave Radiation of the Ocean-Atmosphere: Boundary Heat and Dynamic Interaction:

     Exposure of spectral pieces at centimeters, millimeters, and infrareds, 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, page 62:

     In his room, he could install his infrareds without being discovered.

   • 2007, Ed Morawski, Solving the Security Puzzle, page 79:

     Beams are the active counterparts of passive infrareds (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

radiation of a wavelength between 700 nm and 1 mm

Afrikaans: infrarooi Azerbaijani: infraqırmızı Belarusian: інфрачырво́нае выпраме́ньванне n (infračyrvónaje vypramjénʹvannje, literally “infrared radiation”) Bulgarian: инфрачервен m (infračerven) Catalan: infraroig m Chinese: Mandarin: 紅外線／红外线 (zh) (hóngwàixiàn) Czech: infračervený (cs) Danish: infrarød stråling c Dutch: infrarood (nl) Esperanto: transruĝo, infraruĝo Finnish: infrapuna (fi) French: infrarouge (fr) German: Infrarot Greek: υπέρυθρος (el) (ypérythros) Hindi: अवरक्त (avrakt) Hungarian: infravörös (hu) Icelandic: innrauða n Indonesian: inframerah (id) Irish: infridhearg m Italian: infrarosso (it) m Japanese: 赤外線 (ja) (せきがいせん, sekigaisen) Kazakh: инфрақызыл (infraqyzyl) Korean: 적외선 (ko) (jeogoeseon) Macedonian: инфрацрвено зрачење n (infracrveno zračenje) Malay: inframerah Mongolian: Cyrillic: хэт улаан (xet ulaan) Norman: înfra-rouoge m Norwegian: Bokmål: infrarød stråling c Nynorsk: infraraud stråling Persian: فروسرخ (fa) (forusorx) Polish: podczerwień (pl) f Portuguese: infravermelho (pt) m Russian: инфракра́сное излуче́ние (ru) n (infrakrásnoje izlučénije, literally “infrared radiation”) Scottish Gaelic: fo-dhearg m Serbo-Croatian: infracrven (sh) Spanish: infrarrojo Swedish: infraröd strålning c Tamil: அகச்சிவப்பு (ta) (akaccivappu) Thai: อินฟราเรด (th) (in-fraa-rèet) Turkish: kızılötesi (tr) Ukrainian: інфрачерво́не випромі́нювання n (infračervóne vypromínjuvannja, literally “infrared radiation”) Welsh: isgoch m

Adjective

infrared (not comparable)

1. Having a wavelength in the infrared spectrum.

   Hyponyms: mid-infrared, near-infrared

2. (figurative, physics) Relating to very low energies or very large distances or time 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, page 97:

     Unless otherwise stated, we will be working in Euclidean space compactified to a sphere in order to avoid infrared problems.

   • 2000, Andreas Galka, Topics in Nonlinear Time Series Analysis: With Implications for EEG Analysis, →ISBN, page 176:

     Secondly, as stated already by Osborne & Provenzale, pure k^-α-behaviour is impossible since there would have to be infinite power at zero frequency (this would correspond to an infrared catastrophe).

   • 2010, Taizo Muta, Foundations of Quantum Chromodynamics: An Introduction to Perturbative Methods in Gauge Theories, 3rd edition, →ISBN, page 331:

     Although infrared 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

• cosmic infrared background
• infrared astronomy
• infrared camera
• infrared detector
• infrared divergence
• infrared film
• infrared filter
• infrared fixed point
• infrared homing
• infrared imagery
• infrared lamp
• infrared light
• infrared microscope
• infrared motion detector
• infrared multiphoton dissociation
• infrared photography
• infrared pointer
• infrared port
• infrared radiation
• infrared remote control
• infrared repellor
• infrared sauna
• infrared spectroscopy
• infrared thermography
• infrared thermometer
• infrared waves
• mediumwave infrared
• midinfrared
• near infrared
• noninfrared

 

Translations

having the wavelength in the infrared

Arabic: تَحْتَ اَلْحَمْرَاء (taḥta l-ḥamrāʔ) Azerbaijani: infraqırmızı Basque: infragorri Belarusian: інфрачырво́ны (infračyrvóny) Bulgarian: инфрачервен (infračerven) Catalan: infraroig Chinese: Mandarin: 紅外／红外 (zh) (hóngwài) Cornish: isrudh Czech: infračervený (cs) Danish: infrarød Dutch: infrarood (nl) Esperanto: transruĝa, infraruĝa Finnish: infrapuna-, infrapunainen French: infrarouge (fr) Georgian: ინფრაწითელი (inprac̣iteli) German: infrarot (de) Greek: υπέρυθρος (el) (ypérythros) Hindi: अवरक्त (avrakt) Hungarian: infravörös (hu) Irish: infridhearg, fodhearg Italian: infrarosso (it) Japanese: 赤外 (せきがい, sekigai) Korean: please add this translation if you can Latvian: infrasarkans Macedonian: инфрацрвен m (infracrven) Manx: fo-yiarg Norman: înfra-rouoge Norwegian: Bokmål: infrarød Nynorsk: infraraud Persian: فروسرخ (fa) (forusorx) Polish: podczerwony (pl) Portuguese: infravermelho (pt) Romanian: infraroșu (ro) Russian: инфракра́сный (ru) m (infrakrásnyj) Scottish Gaelic: fo-dhearg Serbo-Croatian: Cyrillic: инфрацрвен Roman: infracrven (sh) Spanish: infrarrojo Swedish: infraröd (sv) Turkish: kızılaltı (tr), kızılötesi (tr) Ukrainian: інфрачерво́ний (infračervónyj) Vietnamese: hồng ngoại (vi)

Further reading

• infrared on Wikipedia.Wikipedia