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sodium-vapor lamp

[ soh-dee-uhm-vey-per ]

noun

, Electricity.
  1. an electric lamp in which sodium vapor is activated by current passing between two electrodes, producing a yellow, glareless light: used on streets and highways.

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Word History and Origins

Origin of sodium-vapor lamp1

First recorded in 1935–40

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[gal-uh-maw-free ]

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