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.
There are fluorescent lights, sweated-out windows, pizzas stacked like evidence, and the unshakable feeling that every other shopper is experiencing their first day on earth while glitching gently in front of the popsicles.
From Salon ● Jul. 11, 2026
Using fluorescent markers, the team observed double-strand DNA breaks appearing as neurons moved through the channels.
From Science Daily ● Jun. 21, 2026
A recent upgrade from fluorescent to LED lighting has only refined the impression.
From The Wall Street Journal ● May 22, 2026
In the nine-minute short, a young cameraman falls into what appears to be an empty furniture store with an eerie atmosphere: a seemingly endless series of rooms covered in yellow wallpaper and buzzing fluorescent lights.
From Los Angeles Times ● May 14, 2026
I blink at the fluorescent lights in the room; a faint buzz emanates from them and reminds me of the lights in my high school library.
From "Internment" by Samira Ahmed
Definitions 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.
