An Arc-Head (also: Archead) is a term used to denote a person who loves high voltage electricity and machinery, used in the same manner as "Gear-Head" or "Petrol-Head" is used to describe an automobile aficionado. An enthusiast of Tesla and the like. The sort of person who loves to play with Van de Graaff generators, tinkers with Tesla coils, and whose soul soars at the sight of a lightening storm.