infrared
/ˌɪnfɹəˈɹɛd/ noun, adjective
Forms infrareds
- noun (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.
- noun (countable) A specific wavelength in this range.
- noun (countable) A device that emits infrared radiation.
- adjective Having a wavelength in the infrared spectrum.
- adjective (figurative, physics) Relating to very low energies or very large distances or time spans.
Synonyms
infrared frequency infrared light infrared radiation infrared emission
Antonyms
Etymology
From infra- + red.
Sources: Wiktionary · WordNet 3.0 — from the Wiktionary entry “infrared”, CC BY-SA 4.0. Details