as in lamp
something that provides illumination
at the time, a spermaceti candle was the brightest indoor illuminant available
Synonyms & Similar Words
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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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Southern live oaks draped in Spanish moss that tower and twist over city squares, Neoclassical Antebellum architecture, gas lamps that flicker over uneven cobblestone paths, and a humid subtropical climate that hangs heavy in the air.—
Nicole Kliest,
Vogue,
18 Oct. 2025
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The lamps flicker on, casting pools of warm light on the pavement.—
Pranjal Malewar,
New Atlas,
18 Oct. 2025
Noun
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The team discovered that oxygen can degrade riboflavin when exposed to light, which leads to self-discharge.—
Aamir Khollam,
Interesting Engineering,
16 Oct. 2025
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Here’s some light Thursday pregame prep, with head-to-head history and B-sides to set Week 7 off right.—
Steven Louis Goldstein,
New York Times,
16 Oct. 2025
Noun
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Admirers can switch between nine lighting modes, including warm white and multicolor hues, as well as flickering and flashing light shows.—
Maggie Horton,
PEOPLE,
22 Oct. 2025
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The lighting design with hues of pinks, blues, and violet, are impeccable by David Lander, making sure the changes are sharp but not intrusive to the character’s world.—
Michelle F. Solomon,
Miami Herald,
21 Oct. 2025
Noun
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The holiday is a major event in India, particularly for followers of Hinduism and Sikhism, and is marked by candle and lamp lighting to symbolize light over darkness and good over evil.—
Stephen Hobbs,
Sacbee.com,
20 Oct. 2025
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For more of the best fall candle picks from Better Homes & Gardens, check out similar options below.—
Caley Sturgill,
Southern Living,
19 Oct. 2025
Cite this Entry
“Illuminant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/illuminant. Accessed 23 Oct. 2025.
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