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irradiance

[ ih-rey-dee-uhns ]
/ ɪˈreɪ di əns /
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noun Physics.

incident flux of radiant energy per unit area.

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Origin of irradiance

First recorded in 1660–70; ir-1 + radiance
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
  • The irradiance, almost as strong as daylight, but radically different, softened all surrounding objects.

    Ben Blair|Will Lillibridge
  • Their irradiance was greenish, like the walls; but I was certain that these corpuscles did not come from them.

  • Overhead, the sky is alight with the warm irradiance of the great city.

    Merchantmen-at-Arms|David W. Bone

British Dictionary definitions for irradiance

irradiance
/ (ɪˈreɪdɪəns) /

noun

the radiant flux incident on unit area of a surface. It is measured in watts per square metreSymbol: E e Also called: irradiation Compare illuminance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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