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illuminant

noun
il·​lu·​mi·​nant | \ i-ˈlü-mə-nənt How to pronounce illuminant (audio) \

Definition of illuminant

: an illuminating device or substance
Synonyms Example Sentences Learn More about illuminant

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Synonyms for illuminant

Synonyms

beacon, lamp, light

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Examples of illuminant in a Sentence

at the time, a spermaceti candle was the brightest indoor illuminant available

Recent Examples on the Web

 Distilling rock oil produced multiple interesting compounds, one of which looked like an ideal illuminant. — Charles R. Morris, WSJ, "‘Energy’ Review: The Path to Power," 21 June 2018

First Known Use of illuminant

1644, in the meaning defined above

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More Definitions for illuminant

illuminant

noun
il·​lu·​mi·​nant | \ -nənt How to pronounce illuminant (audio) \

Medical Definition of illuminant

: an illuminating device or substance (as for a microscope)

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