potential unit - a measure of the potential energy of a unit charge at a give point in a circuit relative to a reference point (ground)

V, volt - a unit of potential equal to the potential difference between two points on a conductor carrying a current of 1 ampere when the power dissipated between the two points is 1 watt; equivalent to the potential difference across a resistance of 1 ohm when 1 ampere of current flows through it