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 decor with sheepskin rugs and arm lamps for reading lights is neither flashy nor overtly quirky, but simple and homey, as if it were designed by a tasteful Scandinavian grandmother who relocated to the wilds of Patagonia.—
Condé Nast,
Condé Nast Traveler,
14 May 2026
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Steps away, a main reception room offers privacy, palm tree lamps, a white sofa and armchairs positioned towards the terrace with sea views.—
Chris Gardner,
HollywoodReporter,
14 May 2026
Noun
-
Seen in this light, the announcements from Iran are likely more signaling than a genuine policy proposal.—
Christopher McFadden,
Interesting Engineering,
17 May 2026
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The aroma blends grassy cane freshness with vanilla cream, citrus peel, green banana, and light caramel.—
Joseph V Micallef,
Forbes.com,
17 May 2026
Noun
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Prevent crickets from entering by sealing cracks, reducing outdoor lighting, and keeping your home's surroundings tidy.—
Olivia McIntosh,
Martha Stewart,
16 May 2026
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The outages are impacting water supply, lighting, refrigeration and communications.—
Julia Jacobo,
ABC News,
16 May 2026
Noun
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There’s a candle in the room where his father was found.—
Eric Sondheimer,
Los Angeles Times,
13 May 2026
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Be proactive about keeping mosquitoes at bay with a large, multi-wick citronella candle around the party area or on top of each table.—
Abigail Wilt,
Southern Living,
11 May 2026
Cite this Entry
“Illuminant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/illuminant. Accessed 20 May. 2026.
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