Noun
electrical conduction through a gas in an applied electric field
Source: WordNetAn electric discharge in the tube causes the mercury atoms to emit mostly ultraviolet light. Source: Internet
Another way to view the statement, "Lightning causes thunder" is to see both lightning and thunder as two perceptions of the same event, viz., an electric discharge that we perceive first visually and then aurally. Source: Internet
It had been known for many years – from the predictions of Kelvin and Von Helmholtz, and confirmed by the experiments of Fedderssen – that in many cases an electric discharge is of an oscillatory character. Source: Internet
The pink-orange glow running through the center of the tube is from the electric discharge which produces incoherent light, just as in a neon tube. Source: Internet