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1. A substance that exhibits phosphorescence.
2. The phosphorescent coating inside the screen of a cathode-ray tube.
[Latin Phōsphorus, the morning star; see phosphorus.]
(General Physics) a substance, such as the coating on a cathode-ray tube, capable of emitting light when irradiated with particles or electromagnetic radiation
[C17: from French, ultimately from Greek phōsphoros phosphorus]
phos•phor(ˈfɒs fər, -fɔr)
a substance that exhibits luminescence when struck by light of certain wavelengths, as by ultraviolet.
[1625–35; < French phosphore < Latin Phōsphorus < Greek Phōsphóros light-bringing, the morning star =phôs light + -phoros bringing]
A substance that can emit light after absorbing some form of radiation. The insides of television screens and fluorescent lamp tubes are coated with phosphors. See Note at cathode-ray tube.
n → Phosphor m