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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Emmet Apolinario, co-founder and president of Ohio Business Advisors, has sold everything from a licensed apparel shop for college sports to a disc golf retailer to a store that just sells lamp shades.—
Brandon Kochkodin,
Forbes.com,
13 Sep. 2025
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Colorful murals adorn the interior, with communal tables and high ceilings, and the outdoors has beer-keg tables and heat lamps and lots of room for patrons — and their dogs — to roam.—
John Metcalfe,
Mercury News,
13 Sep. 2025
Noun
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The body of the foreground object briefly blocks light from the star, as do any rings or satellites.—
Nola Taylor Tillman,
Space.com,
10 Sep. 2025
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Lawrence Kenyon, who lives in Thompson's Station, raised several claims, including defamation, invasion of privacy by false light and intentional infliction of emotional distress.—
Evan Mealins,
The Tennessean,
10 Sep. 2025
Noun
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Customers can wrap the truck’s exterior paneling in a color or print of their choosing, as well as customize lighting and tires, and even convert the two-passenger flat bed truck into a 5-person SUV.—
Jessica Mathews,
Fortune,
10 Sep. 2025
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Candleholders and a modern candelabra lamp that reinterpret the Swedish tradition of lighting windows during the darker months.—
Elizabeth Fogarty,
Better Homes & Gardens,
9 Sep. 2025
Noun
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The candle has four slow-burning wicks, is filled with a paraffin and soy wax blend, and burns for up to 22 hours.—
Stephanie Osmanski,
Better Homes & Gardens,
9 Sep. 2025
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On the other hand, Will — played with a jagged sensitivity by Paul Mescal, making the most of his sad-eyed charisma and physical presence — is a guy who feels more at home at a desk, with only a candle to light his way through the treacherous creative process.—
David Fear,
Rolling Stone,
8 Sep. 2025
Cite this Entry
“Illuminant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/illuminant. Accessed 15 Sep. 2025.
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