Word.ws English Dictionary

infra-red

infra-red is the alternative form of infrared.

Meaning of infrared

Adjective

infrared (not comparable)

  1. Having a wavelength in the infrared spectrum.
  2. (figuratively) Relating to very low energies or very large distances or time spans.
    • Unless otherwise stated, we will be working in Euclidean space compactified to a sphere in order to avoid infrared problems.1986, Luis Álvarez-Gaumé, “An Introduction to Anomalies”, in G. Velo, A. S. Wightman, editors, Fundamental Problems of Gauge Field Theory, →ISBN, page 97
    Antonyms:
    ultraviolet

See all 5 meanings of infrared

Questions about infra-red

What is infra-red the alternative form of?
Infra-red is the alternative form of infrared.

Words near infra-red in the dictionary

  1. infra dignitatem
  2. infra-
  3. infra-inguinal
  4. infra-order
  5. infra-orders
  6. infra-red
  7. infraaortal
  8. infraaortic
  9. infraareolar
  10. infraaxillary
  11. infrabarreled

Source and license

Adapted from Wiktionary: infra-red (page history and authors); infrared (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “infra-red.” Word.ws, https://word.ws/infra-red. Based on Wiktionary, CC BY-SA 4.0.