• synonyms


[floo-res, flaw-, floh-]
verb (used without object), fluo·resced, fluo·resc·ing.
  1. to exhibit fluorescence.
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Origin of fluoresce

First recorded in 1870–75; back formation from fluorescence
Related formsfluo·resc·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for fluoresce

Historical Examples

  • Some substances also, which fluoresce at ordinary temperatures, will phosphoresce at low temperatures.

    The Nature of Animal Light

    E. Newton Harvey

  • Certain crystals, like barium platinum cyanide, fluoresce when struck by the "X" rays.


    Willis Eugene Tower

  • Liquids which fluoresce only do so while the exciting light is falling on them, ceasing immediately the exciting light is cut off.

British Dictionary definitions for fluoresce


  1. (intr) to exhibit fluorescence
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Word Origin

C19: back formation from fluorescence
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012