Etymology
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phosphorescent (adj.)

shining with a faint light or luminosity like that of phosphorus, luminous without sensible heat," "1766, from Modern Latin phosphorus (see phosphorus) + -escent. Related: Phosphorescently.

updated on May 27, 2020

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Definitions of phosphorescent from WordNet

phosphorescent (adj.)
emitting light without appreciable heat as by slow oxidation of phosphorous;
the phosphorescent glow of decaying wood
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.