as in lamp
something that provides illumination
at the time, a spermaceti candle was the brightest indoor illuminant available
Synonyms & Similar Words
Relevance
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
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
-
Festival wares for sale include paintings, textiles, sculptures, pottery, jewelry, lamps, Halloween items, Christmas decor and so much more.—
Arkansas Online,
Arkansas Online,
12 Oct. 2025
-
To open it up, flip the lamp on the end over to free the components.—
New Atlas,
New Atlas,
10 Oct. 2025
Noun
-
The team discovered that oxygen can degrade riboflavin when exposed to light, which leads to self-discharge.—
Aamir Khollam,
Interesting Engineering,
16 Oct. 2025
-
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
-
So watch the video carefully and try to catch the signs of unnatural eye movements, lip-sync issues, weird lighting, shadows and voice inconsistencies.—
Kurt Knutsson,
FOXNews.com,
14 Oct. 2025
-
Inside, there’s the occasional model being fitted and photographed, outside there are truck drivers, caterers, lighting specialists and many more milling around or scurrying about.—
Evan Clark,
Footwear News,
14 Oct. 2025
Noun
-
These are for the artful burner, someone who lights a candle as much for its vibe as its aroma.—
Michael Stefanov,
Robb Report,
14 Oct. 2025
-
Each candle pairs a calming scent with a meaningful crystal, like rose quartz for healing or garnet for passion.—
Christa Joanna Lee,
Glamour,
13 Oct. 2025
Cite this Entry
“Illuminant.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/illuminant. Accessed 19 Oct. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share