Microvolt is a unit of measurement that describes an electrical potential difference equal to one millionth of a volt. There are several synonyms that can describe this tiny electrical measurement including mV, µV, millionth of a volt, and microvolts per meter. In the field of neuroscience, microvolt is used to describe the faint electrical signals produced by neurons or the brain. In physics, microvolt is used to measure the voltage produced by tiny electronic devices or communication systems. Microvolt is a small yet important unit of measurement that is used in many fields, from science and engineering to medicine and technology.