as in lamp
something that provides illumination
at the time, a spermaceti candle was the brightest indoor illuminant available
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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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Thy word is a lamp unto my feet and a light unto my path.—
Literary Hub,
Literary Hub,
23 Jan. 2026
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Furniture included two modern, heather gray wingback reading chairs with lamps, wicker ottomans, and beautiful wooden shelves and tables.—
Condé Nast,
Condé Nast Traveler,
22 Jan. 2026
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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After dinner, couples can pick a tube and head into the rose pedal and floating candle adorned lazy river, enjoying a special floating dessert and champagne service, while being serenaded by a string musician.—
Melissa Kravitz Hoeffner,
Forbes.com,
21 Jan. 2026
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Trudon’s creative director Hugo Ferroux is opening a new chapter for the French niche candle and fragrance brand founded in 1643.—
Jennifer Weil,
Footwear News,
21 Jan. 2026
Cite this Entry
“Illuminant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/illuminant. Accessed 29 Jan. 2026.
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