fluoresce

verb

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

intransitive verb

: to produce, undergo, or exhibit fluorescence
fluorescer noun

Example Sentences

Recent Examples on the Web In some cases, using a different technique, the cells can also be made to fluoresce under a light source, allowing a researcher with a microscope to watch the brain at work. Adam Rogers, Wired, 24 Nov. 2021 In October, researchers reported that the already perplexing animals fluoresce a psychedelic blue-green color under black light. New York Times, 18 Dec. 2020 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, 3 Sep. 2020 The copies are cleverly designed to fluoresce when they’re formed. Beth Mole, Ars Technica, 18 Aug. 2020 And at that point, the solution can fluoresce so much that it can be detected. Andy Larsen, The Salt Lake Tribune, 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, 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, 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, 26 Mar. 2020 See More

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.

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

Dictionary Entries Near fluoresce

Cite this Entry

“Fluoresce.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fluoresce. Accessed 5 Dec. 2022.

Kids Definition

fluoresce

verb

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

Medical Definition

fluoresced; fluorescing
: to produce, undergo, or exhibit fluorescence
fluorescer noun
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