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

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Those echoes will fluoresce in different ways depending on the atoms present in the sample. Jennifer Ouellette, Ars Technica, "Physicists discover hidden text in what was thought to be blank Egyptian papyri," 22 Aug. 2019 Corals, too, can fluoresce very prettily in a wide range of hues, and the proteins that cause this are in the same family as GFP. Jennifer Ouellette, Ars Technica, "We now know what causes these two shark species to glow green," 8 Aug. 2019 As this glow washes over nearby rocks, the elements within them will fluoresce, letting Pragyaan see their chemical makeup. Michael Greshko, National Geographic, "India's historic moon mission launches toward lunar south pole," 22 July 2019 It is made of a semiconducting material capable of fluorescing when struck by ultraviolet rays, and different sorts of dot fluoresce in different colours. The Economist, "Fungi, it turns out, are canny traders of nutrients to plants," 8 June 2019 The quinine in tonic water will fluoresce a bright blue, as will the darkest spots on an overripe banana. Helen Czerski, WSJ, "Behind Sparkling White Uniforms, an Optical Trick," 24 May 2018 This involves introducing into cells genes that produce proteins that fluoresce with a greenish glow, so they and their axons (neurons’ output wires) can be visualized with light microscopy. Simon Makin, Scientific American, "“Bar Codes.” Could Trace Errant Brain Wiring in Autism and Schizophrenia," 30 Mar. 2018 To distinguish between neurons and glia, Herculano-Houzel injected the vials with a chemical dye that would make all nuclei fluoresce blue under ultraviolet light, and then with another dye to make the nuclei of neurons glow red. Ferris Jabr, New York Times, "To Unlock the Brain’s Mysteries, Purée It," 14 Dec. 2017 Almost any body fluid will fluoresce at 454 nanometers, but in this case the fluid is semen—though not from the original crime; that was all removed in swatches for evidence. Jeffrey Kluger, Time, "It Might Be Impossible to Get Away With Crime Some Day," 28 July 2017

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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Statistics for fluoresce

Last Updated

12 Sep 2019

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Time Traveler for fluoresce

The first known use of fluoresce was in 1874

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More Definitions for 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

Medical Definition of fluoresce

: to produce, undergo, or exhibit fluorescence

Other Words from fluoresce

fluorescer noun

More from Merriam-Webster on fluoresce

Rhyming Dictionary: Words that rhyme with fluoresce

Comments on fluoresce

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recurring in steady succession

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