fluorescent
Americanadjective
-
possessing the property of fluorescence; exhibiting fluorescence.
-
strikingly bright, vivid, or glowing.
plastic toys in fluorescent colors.
noun
adjective
Other Word Forms
Etymology
Origin of fluorescent
Explanation
A fluorescent bulb gets its light from mercury vapor inside a glass tube. The incandescent bulb — the kind associated with Thomas Edison — has a filament that glows when it's heated. You can also use fluorescent to describe something that's so vivid and bright it seems to give off light. Fluorescent is related to the word fluorspar, or fluorite, which is a mineral that glows. Notice the -u- in these words. Fluorescent comes from the Latin fluere "to flow" — fluorspar can be added to welding compounds, for instance, to make them flow more easily. Florescent, without a -u-, means "flowering," from Latin flor-, which is a completely different root.
Vocabulary lists containing fluorescent
Frindle
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The Lemonade War
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The Marvels
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The fluorescent lithium fluoride detectors aboard Artemis I were manufactured using the Czochralski method, a technique for growing crystals.
From Science Daily ● Oct. 28, 2026
Khalil's ordeal also exposed him to conditions in a Louisiana jail he likened to torture, describing constant fluorescent light, cold, and poor food.
From Barron's ● Oct. 28, 2026
Ilija Srdanović appears an unlikely opponent for Serbia's long-serving leader, Aleksandar Vučić, arriving for an interview by motorbike sporting a fluorescent yellow jacket emblazoned with pro-student slogans.
From BBC ● Oct. 23, 2026
One of the most important advantages of the new microscope is its ability to reveal cellular activity without relying on fluorescent markers.
From Science Daily ● Oct. 17, 2026
But there are seats on both sides, and a thin, fluorescent stripe along the wall, like a color-changing glow stick.
From "Leah on the Offbeat" by Becky Albertalli
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Get a wordDefinitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
