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.
To investigate, the scientists attached a fluorescent marker to a-beta.
From Science Daily ● Jun. 19, 2026
Picture an abandoned, windowless yellow room with garish fluorescent lights.
From The Wall Street Journal ● Jun. 6, 2026
One user posted an image of an abandoned office space, with mustard yellow wallpaper and fluorescent lighting.
From BBC ● May 29, 2026
Exhaustion was setting in, but the deodorant I’d packed needed to be replaced, so I found myself roaming the body care aisles, wincing under the fluorescent lights as my patience rapidly grew thinner.
From Salon ● May 22, 2026
Ama grabs our wrists and pulls us through the fluorescent hallway.
From "Kwame Crashes the Underworld" by Craig Kofi Farmer
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.
