illuminant
nounUK /ɪˈluːmɪnənt/
US /ɪˈluːmɪnənt/
Something that gives off light so you can see.
The sun is the biggest illuminant in our sky.
SYNONYMS
RELATED WORDS
OTHER MEANINGS
2. A substance that makes something else glow or shine.
The scientist added an illuminant to the paint so it would glow in the dark.
3. Something that helps you understand an idea more clearly.
Her story was an illuminant that made the confusing lesson easy to grasp.
4. A material used in printing or dyeing to make colors look brighter.
The printer used an illuminant to make the poster colors pop.