fluoresce

verb

fluo·​resce flu̇-ˈres How to pronounce fluoresce (audio)
flȯ-
fluoresced; fluorescing

intransitive verb

: to produce, undergo, or exhibit fluorescence
fluorescer noun

Examples of fluoresce 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.
Scientists also referenced research suggesting scorpion exoskeletons can fluoresce under ultraviolet light and may function as a light-sensing surface. Hanna Wickes, Charlotte Observer, 10 Mar. 2026 Scientists referenced research suggesting that scorpion exoskeletons can fluoresce under ultraviolet light and may function as a light-sensing surface. Hanna Wickes, Miami Herald, 10 Mar. 2026 The study also referenced research suggesting scorpion exoskeletons can fluoresce under ultraviolet light and may function as a light-sensing surface. Hanna Wickes, Kansas City Star, 10 Mar. 2026 Biological material such as semen also fluoresces under UV light. Anirban Mukhopadhyay, Scientific American, 21 Jan. 2026 See All Example Sentences for fluoresce

Word History

Etymology

back-formation from fluorescence

First Known Use

1874, in the meaning defined above

Time Traveler
The first known use of fluoresce was in 1874

Browse Nearby Words

Cite this Entry

“Fluoresce.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fluoresce. Accessed 12 Mar. 2026.

Kids Definition

fluoresce

verb
flu·​o·​resce
ˌflu̇(-ə)r-ˈes
fluoresced; fluorescing
: to produce, exhibit, or be exposed to fluorescence

Medical Definition

fluoresce

intransitive verb
flu·​o·​resce ˌflu̇(-ə)r-ˈes How to pronounce fluoresce (audio) flōr- How to pronounce fluoresce (audio) flȯr- How to pronounce fluoresce (audio)
fluoresced; fluorescing
: to produce, undergo, or exhibit fluorescence
fluorescer noun
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