radiancy
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ra·di·ance
(rā′dē-əns) also ra·di·an·cy (-ən-sē)n.
1. The quality or state of being radiant.
2. Physics The radiant energy emitted per unit time in a specified direction by a unit area of an emitting surface.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Noun | 1. | radiancy - the quality of being bright and sending out rays of light brightness - the location of a visual perception along a continuum from black to white |
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