Mercury-vapor-lamp meaning

mʉrkyyo͝orēvāpər, mʉrkərēvāpər
A lamp in which ultraviolet and yellowish-green to blue visible light is produced by an electric discharge through mercury vapor. The color spectrum may be corrected by the addition of a phosphor coating, and ultraviolet blocking is required to prevent injury.
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A discharge lamp containing mercury vapor.
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(US) Alternative spelling of mercury-vapour lamp.
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