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intr.v. phos·pho·resced, phos·pho·resc·ing, phos·pho·resc·es
To persist in emitting light, unaccompanied by sensible heat or combustion, after exposure to and removal of a source of radiation.
[Probably back-formation from phosphorescent.]
(General Physics) (intr) to exhibit phosphorescence
v.i. -resced, -resc•ing.
to be luminous without sensible heat, as phosphorus.
Past participle: phosphoresced