from The American Heritage® Dictionary of the English Language, 4th Edition

  • intransitive v. To persist in emitting light, unaccompanied by sensible heat or combustion, after exposure to and removal of a source of radiation.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To exhibit phosphorescence

from the GNU version of the Collaborative International Dictionary of English

  • intransitive v. To shine as phosphorus; to be phosphorescent; to emit a phosphoric light.

from The Century Dictionary and Cyclopedia

  • To shine, as phosphorus, by exhibiting a faint light without sensible heat; give out a phosphorescent light.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. to exhibit phosphorescence


Probably back-formation from phosphorescent.
(American Heritage® Dictionary of the English Language, Fourth Edition)
C 1794 phosphor +‎ -esce (Wiktionary)



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