Meaning & use
Illuminant
Last updated
A substance or source that provides light, especially one used as a standard reference in lighting or color measurement.
See it in a sentence
The lamp used a gas illuminant before electric bulbs became common.
Photographers must account for the color temperature of the illuminant when shooting indoors.
A note on using this word
In color science, "Illuminant D65" is a standard reference used to simulate average daylight.
Words with a similar meaning
light source
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Another way to use it
2. adjective
Providing or producing light.
The room was lit by an illuminant gas lamp.
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