Definitions for illuminantɪˈlu mə nənt
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Random House Webster's College Dictionary
il•lu•mi•nantɪˈlu mə nənt(n.)
an illuminating agent or material.
Origin of illuminant:
1635–45; < L
Princeton's WordNet
illuminant(noun)
something that can serve as a source of light
Wiktionary
illuminant(Noun)
Something that illuminates.
Webster Dictionary
Illuminant(noun)
that which illuminates or affords light; as, gas and petroleum are illuminants
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