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illuminant

[ih-loo-muh-nuh nt] /ɪˈlu mə nənt/
noun
1.
an illuminating agent or material.
Origin of illuminant
1635-1645
1635-45; < Latin illūminant- (stem of illūmināns) present participle of illūmināre to light up, brighten, equivalent to illūmin- (see illumine) + -ant- -ant
Related forms
nonilluminant, noun
unilluminant, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for illuminant

illuminant

/ɪˈluːmɪnənt/
noun
1.
something that provides or gives off light
adjective
2.
giving off light; illuminating
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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