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Definition of fluorescence noun from the Oxford Advanced Learner's Dictionary

fluorescence

noun
 
/fləˈresns/
 
/fləˈresns/
[uncountable]
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  1. bright light produced by some forms of radiation
    • X-ray fluorescence
  2. the quality of a colour, material, etc. that appears very bright when light shines on it, so it can be seen in the dark
  3. compare phosphorescence
See fluorescence in the Oxford Learner's Dictionary of Academic English
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