as in lamp
something that provides illumination
at the time, a spermaceti candle was the brightest indoor illuminant available
Synonyms & Similar Words
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Example Sentences
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Recent Examples of illuminant
Related Stories For the Judge LED, users can choose seven light sources from a selection of different temperatures that fit industry standards, including a directional daylight output with the standard illuminant D65.
—
Sarah Jones, Sourcing Journal, 16 Jan. 2025
Distilling rock oil produced multiple interesting compounds, one of which looked like an ideal illuminant.
—Charles R. Morris, WSJ, 21 June 2018
Sarah Jones, Sourcing Journal, 16 Jan. 2025
Distilling rock oil produced multiple interesting compounds, one of which looked like an ideal illuminant.
—Charles R. Morris, WSJ, 21 June 2018
Recent Examples of Synonyms for illuminant
Noun
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As a compromise, Nico has taken one of the lamps back and set it on the floor, shrouded with his own shirt.—
David Wingrave,
Harpers Magazine,
24 Oct. 2025
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And the autumn Paris weather played nice — just a few gusts knocking down some lamps and a few showers prompting umbrellas to save our gear!—
Greg Palkot,
FOXNews.com,
24 Oct. 2025
Noun
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In fact, this team found that even after the light from Type Ia supernovas was standardized, Type Ia supernovas from populations of younger stars were fainter than those belonging to older stellar populations.—
Robert Lea,
Space.com,
6 Nov. 2025
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Never use your high-beam lights.—
CA Weather Bot,
Sacbee.com,
6 Nov. 2025
Noun
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The aesthetic is defined by deep red and forest green tartans, warm lighting, elevated accents, and sophisticated dinnerware that evokes classic holiday charm with a polished Americana flair.—
Alicia Geigel,
Southern Living,
4 Nov. 2025
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The residence’s cosmopolitan glamour, courtesy of the French interior designer Jean-Louis Deniot, showcases custom millwork, an array of rare marbles, and artful modern lighting.—
Mark David,
Robb Report,
4 Nov. 2025
Noun
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Officials said that the pair caused the explosion by setting off a Roman candle firework.—
Michael Dorgan , Stephen Sorace,
FOXNews.com,
4 Nov. 2025
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To add a cozy finishing touch, supplement—or replace—fireside lighting with candles or candle lamps.—
Maria Sabella,
Better Homes & Gardens,
4 Nov. 2025
Cite this Entry
“Illuminant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/illuminant. Accessed 8 Nov. 2025.
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