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[rey-dee-uh ns] /ˈreɪ di əns/
radiant brightness or light:
the radiance of the tropical sun.
warm, cheerful brightness:
the radiance of her expression.
Rare. radiation.
Also, radiancy.
Origin of radiance
First recorded in 1595-1605; radi(ant) + -ance
Related forms
nonradiance, noun
subradiance, noun
superradiance, noun
1. resplendence, splendor, brilliance. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for radiance
Contemporary Examples
Historical Examples
  • Sidney, as tender as ever, had lost a little of the radiance from her eyes; her voice had deepened.

    K Mary Roberts Rinehart
  • Around them was a radiance of virtues and graces from the first hour of their meeting.

    The Dream Emile Zola
  • This portion of the figure he enriches by the attribution of whiteness, or unity and radiance.

    A Dish Of Orts George MacDonald
  • This time it was the old Buddha of the radiance of the Light.

  • Suddenly its radiance turned blue, and was split into two tongues.

  • And there, on the bank, he found a wooden coffin, from which came the radiance he had noticed.

  • Oh, how the moon, intoxicated with radiance, bewilders all the world!'


    Benjamin Taylor
  • A moment later she was on the terrace bathed in the radiance of the moon.

    A Spirit in Prison Robert Hichens
  • The moonlight, which dimmed their radiance, made them look like pools of blood.

British Dictionary definitions for radiance


noun (pl) -ances, -ancies
the quality or state of being radiant
a measure of the amount of electromagnetic radiation leaving or arriving at a point on a surface. It is the radiant intensity in a given direction of a small element of surface area divided by the orthogonal projection of this area onto a plane at right angles to the direction Le
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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Word Origin and History for radiance

c.1600, "brilliant light," from radiant or else from Medieval Latin radiantia "brightness," from radiare "to beam, shine" (see radiation). Figurative use from 1761. Related: Radiancy.

Online Etymology Dictionary, © 2010 Douglas Harper
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radiance in Medicine

radiance ra·di·ance (rā'dē-əns) or ra·di·an·cy (-ən-sē)

  1. The quality or state of being radiant.

  2. The radiant energy emitted per unit time in a specified direction by a unit area of an emitting surface.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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