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

Definition of fluoresce

intransitive verb

: to produce, undergo, or exhibit fluorescence

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Other Words from fluoresce

fluorescer noun

Examples of fluoresce in a Sentence

Recent Examples on the Web Stewart and his colleagues reckon that an amino acid like phenylalanine, which is released from a dead body, could cause leaves to fluoresce in a distinct way. Matt Simon, Wired, "Could a Tree Help Find a Decaying Corpse Nearby?," 3 Sep. 2020 The copies are cleverly designed to fluoresce when they’re formed. Beth Mole, Ars Technica, "COVID spit test is faster, cheaper, avoids shortages—and now greenlit by FDA," 18 Aug. 2020 And at that point, the solution can fluoresce so much that it can be detected. Andy Larsen, The Salt Lake Tribune, "Coronavirus testing: How it works, why Utah’s tests are down, and what’s coming next?," 9 Aug. 2020 That distantly related species of amphibians all fluoresced suggests that the trait likely developed early in amphibian evolution and may be quite widespread among the group. Joanna Klein, New York Times, "Salamanders and Frogs Hide a Glowing Secret," 27 Feb. 2020 But knowing a tiny amphibian might shine green among leaves that fluoresce red in blue light, could make surveys much easier. Joanna Klein, New York Times, "Salamanders and Frogs Hide a Glowing Secret," 27 Feb. 2020 As a control, Rober uses a blacklight to note which spots fluoresced before the students (who didn't know about the experiment) arrived. Isabel Garcia, House Beautiful, "This YouTuber Uses Glowing Powder to Show How Germs Spread," 26 Mar. 2020 Could this be why so few amphibians were known to fluoresce? Joanna Klein, New York Times, "Salamanders and Frogs Hide a Glowing Secret," 27 Feb. 2020 Researchers who survey disappearing populations of amphibians could make use of the trait to spot green-fluorescing salamanders in a jungle. Theresa Machemer, Smithsonian Magazine, "In Blue Light, Most Amphibians Have a Neon-Green Glow," 1 Mar. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fluoresce.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of fluoresce

1874, in the meaning defined above

History and Etymology for fluoresce

back-formation from fluorescence

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Time Traveler for fluoresce

Time Traveler

The first known use of fluoresce was in 1874

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Statistics for fluoresce

Last Updated

9 Sep 2020

Cite this Entry

“Fluoresce.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fluoresce. Accessed 18 Sep. 2020.

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More Definitions for fluoresce

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

Medical Definition of fluoresce

: to produce, undergo, or exhibit fluorescence

Other Words from fluoresce

fluorescer noun

Comments on fluoresce

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