fluorescent

adjective

fluo·​res·​cent flu̇-ˈre-sᵊnt How to pronounce fluorescent (audio)
flȯ-
1
: having or relating to fluorescence
2
: bright and glowing as a result of fluorescence
fluorescent inks
broadly : very bright in color
fluorescent noun
fluorescently adverb

Examples of fluorescent in a Sentence

Recent Examples on the Web
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.
Fear may thrive in the shadows, but here, under bright fluorescent lights, the terror feels even more malevolent, something ambient and inescapable. Justin Chang, New Yorker, 10 Apr. 2026 Back then, our creeks and rivers were just anonymous underpasses, not worth even taking my eyes off the billboards, fluorescent signage and palm trees. Deputy Managing Editor, Los Angeles Times, 10 Apr. 2026 Lower intensity fluorescent lights need to be positioned closer to the seedlings at two to four inches. Tim Johnson, Chicago Tribune, 4 Apr. 2026 The woman is lit up by the fluorescent lighting. Literary Hub, 3 Apr. 2026 See All Example Sentences for fluorescent

Word History

First Known Use

1853, in the meaning defined at sense 1

Time Traveler
The first known use of fluorescent was in 1853

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Cite this Entry

“Fluorescent.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fluorescent. Accessed 17 Apr. 2026.

Kids Definition

fluorescent

adjective
flu·​o·​res·​cent
ˌflu̇(-ə)r-ˈes-ᵊnt
1
: having or relating to fluorescence
2
: very bright in color
fluorescent markers

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