volt (V)
measure of electric potential or electromotive force. A potential of one volt appears across a resistance of one ohm when a current of one ampere flows through that resistance.
voltage
difference in electrical potential between any two conductors or between a conductor and ground. A measure of the electric energy per electron that electrons can acquire and/or give up as they move between the two conductors.
voltage regulator
1) pertaining to electric utilities. device used to maintain the voltage within the electrical conductors at a constant level and within the defined tolerances. 2) device in the electrical system of a vehicle or equipment engine.