1) Potential unit 
• (n.) A measure of electro-motive force; the millionth part of one volt.
(μV) (mi´kro-volt) one millionth (10−6) of a volt.
Mi`cro·volt' noun [ Micro- + volt .] (Electricity) A measure of electro-motive force; the millionth part of one volt. 
(mcV) Type: Term Pronunciation: mī′krō-vōlt Definitions: 1. One millionth of a volt.
One millionth of a volt, 10-6 volts. 
noun a unit of potential equal to one millionth of a volt