Phrase guide

infrared radiation

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

Electromagnetic radiation having a wavelength approximately between 1 micrometre and 1 millimetre; perceived as heat.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: infrared, infrared light, infrared emission

Antonyms: none provided

Broader terms: actinic radiation, actinic ray

History

Etymology

No etymology was provided for this word.

Across languages

Translations

18 source translations are retained for this English entry.

  • Belarusian: інфрачырвонае выпраменьванне (infračyrvónaje vypramjenʹvannje) — infrared radiation
  • Chinese Mandarin: 紅外線 /红外线 (hóngwàixiàn) — infrared radiation
  • Czech: infračervené záření — infrared radiation
  • Finnish: infrapunasäteily — infrared radiation
  • Galician: radiación infravermella — infrared radiation
  • German: Infrarotstrahlung — infrared radiation
  • Japanese: 赤外線 (sekigaisen) — infrared radiation
  • Korean: 적외선 (jeogoeseon) — infrared radiation
  • Lithuanian: infraraudonieji spinduliai — infrared radiation
  • Macedonian: инфрацрвено зрачење (infracrveno zračenje) — infrared radiation
  • Romanian: radiație infraroșie — infrared radiation
  • Russian: инфракрасное излучение (infrakrasnoje izlučenije) — infrared radiation
  • Slovak: infračervené žiarenie — infrared radiation
  • Slovene: infrardeče sevanje — infrared radiation
  • Spanish: radiación infrarroja — infrared radiation
  • Ukrainian: інфрачерво́не випромі́нювання (infračervóne vypromínjuvannja) — infrared radiation
  • Vietnamese: tia hồng ngoại — infrared radiation
  • Vietnamese: bức xạ hồng ngoại — infrared radiation