Similar term(s): microshock.
A momentary electric discharge between two differently charged objects. Sparks
cross the air-gap between the objects along a narrow channel, which is visible
as a light flash.
Small painful spark discharges can occur when a person who is well insulated
from the ground through wearing shoes with plastic soles touches an object that
is electrically connected to the ground. If the electric currents are very small
(microshocks of less than 1mA) they are usually not
A lightning discharge can be considered a large-scale spark discharge.
Example of spark discharge
Source: Tesla Technology research New design Model One Tesla
To read about this term in context:
GreenFacts Summary on Static Fields:
Español: Descarga de chispa