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
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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 The movie had moments of discordant comedy, but Sidney Lumet staged it in his hair-trigger fluorescent vérité style. Owen Gleiberman, Variety, 31 Mar. 2026 In a dark room, even fluorescent lights can help. Karen Brewer Grossman, Southern Living, 13 Mar. 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 5 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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