irradiance

I1R1R1A1D2I1A1N1C3E1
/ɪˈɹeɪ.di.əns/

noun

The act of irradiating; emission of rays of light.

Less commonScrabble 13
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Meanings

nounirradiance (countable and uncountable, plural irradiances)

plural irradiances

  1. countableuncountableThe act of irradiating; emission of rays of light.
  2. countableuncountableThat which irradiates or is irradiated; lustre; splendour; brilliancy.
  3. countableuncountablenatural sciencesThe radiant power received by unit area of surface.

    The geometry of the cone θ and the irradiance at the image of the carbon block were used to determine the absolute steradiancy of the energy in the cone θ as a radiometer calibration value.

    1959, United States. National Aeronautics and Space Administration, NASA Technical Note (issues 3641-3650, page 15)

Synonyms & antonyms

Also see
irradiancy

Origin

From irradiant + -ance.

Full word history & related roots →

Translations

Finnish säteilytysvoimakkuus
  • säteilytysvoimakkuusphysics: Radiant power received by unit area of surface
German Bestrahlungsstärke
  • Bestrahlungsstärkephysics: Radiant power received by unit area of surface
Spanish irradiancia
  • irradianciaphysics: Radiant power received by unit area of surface

Rhymes & wordplay

Anagrams

carinderia
Cite this entry
APA

irradiance. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/irradiance

MLA

“irradiance.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/irradiance. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “irradiance,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/irradiance.

Source: irradiance on Wiktionary, CC BY-SA 4.0.