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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The heat lamp is focused on Juan Soto in Queens right now.—
Chris Branch,
New York Times,
22 May 2025
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Use cable ties to secure any dangling cords from lamps, computers, TVs or other electronics.—
Cody Godwin,
USA Today,
22 May 2025
Noun
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And at night, lights from the tank and a nearby tower guide pilots to it.—
Dorany Pineda,
Los Angeles Times,
25 May 2025
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Think light beer, string lights, pizza, a cake with a callback to a joke from the show on it.—
Kelly Stout,
Rolling Stone,
25 May 2025
Noun
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Many underground cinematic works are shot with handheld cameras, documentary-style cinematography, and non-studio lighting.—
Ali Farahmand,
IndieWire,
23 May 2025
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Remember, a tent offers no protection from lighting.—
NC Weather Bot,
Charlotte Observer,
23 May 2025
Noun
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Lighting a candle or playing soft music can enhance the atmosphere.—
Matt Rozo,
Mercury News,
28 May 2025
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Continually high interest rates and economic uncertainty are further diminishing consumer interest in non-essential products such as fragrances and candles.—
Trefis Team,
Forbes.com,
28 May 2025
Cite this Entry
“Illuminant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/illuminant. Accessed 5 Jun. 2025.
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