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[floo-res, flaw-, floh-] /flʊˈrɛs, flɔ-, floʊ-/
verb (used without object), fluoresced, fluorescing.
to exhibit fluorescence.
Origin of fluoresce
First recorded in 1870-75; back formation from fluorescence
Related forms
fluorescer, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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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.

    Physics 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


(intransitive) to exhibit fluorescence
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
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