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sodium-vapor lamp

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so⋅dium-va⋅por lamp

[soh-dee-uhm-vey-per]
–noun Electricity.
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.
Also called sodium lamp.


Origin:
1935–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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so·di·um-va·por lamp   (sō'dē-əm-vā'pər)
n.  An electric lamp containing a small amount of sodium and neon gas, used in generating yellow light for lighting streets and highways.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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