Phosphor
/fˈɑˌsfɔr/
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Definition
(noun) Any of various compounds of transition metals or of rare earths that exhibit phosphorescence.
Sentence Examples
The inside of the TV screen is coated with a layer of phosphor.
Phosphor materials are used to create light in some lamps.
CEFR Practice Quiz
The screen was coated with a ____ material that glowed when struck by an electron beam.