as in lamp
something that provides illumination
at the time, a spermaceti candle was the brightest indoor illuminant available
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Example Sentences
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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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Brass faucets, oak tables, lamps, and chairs from the old hotel were restored to reduce waste in the rebuild process.—
Heather Richardson,
Travel + Leisure,
6 Sep. 2025
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Plenty of brands already offer or are transitioning to TPO-free formulas that contain different photoinitiators (a chemical that makes gel polishes cure under a lamp instead of air-drying like regular polish) such as TPO-L, BAPO, or other resin initiators.—
Hannah Nwoko,
Parents,
5 Sep. 2025
Noun
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At the end of the historic galleries, where light begins pouring into the building, visitors move above ground and pass by a quote from poet and Civil Rights activist Langston Hughes.—
BrieAnna J. Frank,
USA Today,
4 Sep. 2025
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If caught in one, pull off the road, turn off your lights and keep your foot off the brake.—
Arizona Republic,
AZCentral.com,
4 Sep. 2025
Noun
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Water may enter the body control module of the affected Mustangs, causing a loss of communication with the exterior lighting, including the license plate light, side marker, and tail lights.—
James Powel,
USA Today,
2 Sep. 2025
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During the period, DyStar achieved a 44 percent reduction in emission intensity through several initiatives ranging from LED lighting upgrades and better equipment insulation to moving high-energy production to more energy-efficient units in other countries.—
Angela Velasquez,
Sourcing Journal,
2 Sep. 2025
Noun
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Go for a scented candle, colorful leaves from around your neighborhood, your own plentiful cornucopia of pastries, or a small Pumpkin Bundt Cake—sky's the limit.—
Abigail Wilt,
Southern Living,
2 Sep. 2025
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The package included a bottle of wine, a candle and chocolates.—
Nicki Cox,
People.com,
31 Aug. 2025
Cite this Entry
“Illuminant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/illuminant. Accessed 10 Sep. 2025.
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