fluorescence
noun
fluo·res·cence
flu̇-ˈre-sᵊn(t)s 
flȯ-
: luminescence that is caused by the absorption of radiation at one wavelength followed by nearly immediate reradiation usually at a different wavelength and that ceases almost at once when the incident radiation stops
also
: the radiation emitted compare phosphorescence
Examples of fluorescence in a Sentence
studied the fluorescence of certain elements
Recent Examples on the Web
Kenny Travouillon, a terrestrial zoology curator at Western Australian Museum, said that the findings of the new study further confirm that fluorescence is common in mammals.
—
Taylor Nicioli, CNN Money, 29 Oct. 2025
Even the fluorescence from tiny ruby crystals helped measure the pressure, while Raman spectroscopy revealed how the water molecules were dancing inside.
—Pranjal Malewar, New Atlas, 26 Oct. 2025
Measuring this fluorescence allows scientists to calculate how many atoms are in the trap.
—IEEE Spectrum, 24 Sep. 2025
Some subdomains showed higher fluorescence intensity and spectral shifts, marking denser and chemically altered environments.
—Aamir Khollam, Interesting Engineering, 11 Sep. 2025
See All Example Sentences for fluorescence
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Taylor Nicioli, CNN Money, 29 Oct. 2025
Even the fluorescence from tiny ruby crystals helped measure the pressure, while Raman spectroscopy revealed how the water molecules were dancing inside.
—Pranjal Malewar, New Atlas, 26 Oct. 2025
Measuring this fluorescence allows scientists to calculate how many atoms are in the trap.
—IEEE Spectrum, 24 Sep. 2025
Some subdomains showed higher fluorescence intensity and spectral shifts, marking denser and chemically altered environments.
—Aamir Khollam, Interesting Engineering, 11 Sep. 2025
See All Example Sentences for fluorescence
Cite this Entry
“Fluorescence.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fluorescence. Accessed 2 Nov. 2025.
Copy CitationMedical Definition
fluorescence
noun
flu·o·res·cence
-ˈes-ᵊn(t)s
: luminescence that is caused by the absorption of radiation at one wavelength followed by nearly immediate reradiation usually at a different wavelength and that ceases almost immediately when the incident radiation stops
also
: the radiation emitted
fluorescently
adverb
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