as in lamp
something that provides illumination
at the time, a spermaceti candle was the brightest indoor illuminant available
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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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This end table, which is going for under $30, has three shelves that can hold a lamp, books, storage baskets, and other living room accessories.—
Kaitlin Gates,
PEOPLE,
8 Nov. 2025
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The British company Lumie, which specializes in modern-looking light-therapy lamps, recently launched the Lumie Dash ($225), a compact, ten-thousand-lux model that comes in friendly colors like terra-cotta and pistachio.—
Hilton Als,
New Yorker,
7 Nov. 2025
Noun
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Witnesses report that other vehicles besides Good's were blockading unmarked immigration agent vehicles with their emergency LED lights activated.—
Dana Kelley,
Arkansas Online,
9 Jan. 2026
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Choose from four neutral colors—classic black, chocolate brown, light pink, or a creamy white—to add to your wardrobe rotation.—
Mariana Best,
Better Homes & Gardens,
9 Jan. 2026
Noun
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This time around, the company added 15 percent larger cabin windows for the jet’s 12 passengers to enjoy, as well as an advanced acoustic system for quieter flights, customizable interiors, and wireless control of lighting, temperature, and more onboard.—
Nicole Hoey,
Robb Report,
7 Jan. 2026
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Khondji looked at boxing films and paintings, including the work of George Bellows, to figure out the lighting system for the matches.—
David Canfield,
HollywoodReporter,
7 Jan. 2026
Noun
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The event also brought back the brand's limited-edition Holiday Dill-ight candle.—
Kimberlee Speakman,
PEOPLE,
7 Jan. 2026
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Even when unlit, this candle will instantly make your home look more sophisticated thanks to its minimal but stunning design.—
Caroline Hughes,
Travel + Leisure,
6 Jan. 2026
Cite this Entry
“Illuminant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/illuminant. Accessed 9 Jan. 2026.
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