illuminant

[ih-loo-muh-nuh nt]
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noun

an illuminating agent or material.

Origin of illuminant

1635–45; < Latin illūminant- (stem of illūmināns) present participle of illūmināre to light up, brighten, equivalent to illūmin- (see illumine) + -ant- -ant
Related formsnon·il·lu·mi·nant, nounun·il·lu·mi·nant, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Historical Examples of illuminant


British Dictionary definitions for illuminant

illuminant

noun

something that provides or gives off light

adjective

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