Dictionary
so'dium-va•por lamp"
Pronunciation: (sō'dē-um-vā"pur), [key] Elect.
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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.