sodium-vapor lamp

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so′dium-va`por lamp`


n.
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.
[1935–40]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sodium-vapor lamp - lamp in which an electric current passed through a tube of sodium vapor makes a yellow light; used is street lighting
sodium-vapour lamp
lamp - an artificial source of visible illumination
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They are designed to selectively block emission lines from mercury- and sodium-vapor lamps while allowing light from emission nebulae to pass through, thus improving contrast with the background sky.
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