sodium lamp
noun
variants
or less commonly sodium-vapor lamp
plural sodium lamps also sodium-vapor lamps
: an electric lamp that contains sodium vapor and electrodes between which a luminous discharge takes place and that is used especially for lighting highways
Cite this Entry
“Sodium lamp.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sodium%20lamp. Accessed 30 Nov. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share