1. sodium-vapour_lamp

noun. lamp in which an electric current passed through a tube of sodium vapor makes a yellow light; used is street lighting.

Rhymes with Sodium Hydride

2. sodium-vapor_lamp

noun. lamp in which an electric current passed through a tube of sodium vapor makes a yellow light; used is street lighting.

3. hydride

noun. ['ˈhaɪˌdraɪd'] any binary compound formed by the union of hydrogen and other elements.

4. sodium

noun. ['ˈsoʊdiːəm'] a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt).