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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These pieces blend perfectly with lamps designed by Marcel Wanders, the subtle Ice Cream collection, and the natural light that floods the space, bringing the building’s century-old architecture to life.—
Condé Nast,
Condé Nast Traveler,
23 Apr. 2026
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The biggest changes came when Cunnick furnished the place, bringing in Noguchi lamps, a Richard Tuttle chair and lamps, and a Judd side table and daybed, which served as seating in a dining nook.—
Adriane Quinlan,
Curbed,
23 Apr. 2026
Noun
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The game in Italy is still haunted by Calciopoli, the crisis two decades ago that, among other things, shone an unflattering light on the power and influence behind the appointment of referees in Serie A.—
Phil Hay,
New York Times,
27 Apr. 2026
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The lights were turned on, and an announcement came over the speaker to immediately exit.—
Emily Longeretta,
Variety,
26 Apr. 2026
Noun
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That’s pretty phenomenal; Arden even shares credit with the lighting designer, Jen Schriever.—
Chris Jones,
Chicago Tribune,
27 Apr. 2026
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Expanding urbanization and the use of traditional lighting of buildings, highways and residential neighborhoods are blinding us to an eternal beauty.—
Ernie Cowan,
San Diego Union-Tribune,
26 Apr. 2026
Noun
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Popularized by social media and wellness culture, these sellers often provide photos of candle rituals and offer customized services.—
Amber Harding OutKick,
FOXNews.com,
28 Apr. 2026
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Grab a small basket or tray and fill it with things like tea, a candle, lotion, a favorite snack, a handwritten note or a scattering of flower petals.—
Lauren Jarvis-Gibson,
Sacbee.com,
28 Apr. 2026
Cite this Entry
“Illuminant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/illuminant. Accessed 30 Apr. 2026.
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