sodium-vapor lamp


: an electric lamp that contains sodium vapor and electrodes between which a luminous discharge takes place and that is used especially for lighting highways

Word History

First Known Use

1933, in the meaning defined above

Time Traveler
The first known use of sodium-vapor lamp was in 1933

Dictionary Entries Near sodium-vapor lamp

Cite this Entry

“Sodium-vapor lamp.” Dictionary, Merriam-Webster, Accessed 22 May. 2024.

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