illuminant
il·lu·mi·nant
noun \-nənt\Definition of ILLUMINANT
: an illuminating device or substance
Examples of ILLUMINANT
- <at the time, a spermaceti candle was the brightest indoor illuminant available>
First Known Use of ILLUMINANT
1644
il·lu·mi·nant
noun \-nənt\ (Medical Dictionary)Medical Definition of ILLUMINANT
: an illuminating device or substance (as for a microscope)
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