sodium-vapor lamp
[ soh-dee-uh m-vey-per ]
/ ˈsoʊ di əmˌveɪ pər /
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 of sodium-vapor lamp
First recorded in 1935–40