potentiometer
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po·ten·ti·om·e·ter
(pō-ten'shē-om'ĕ-tĕr),1. An instrument used for measuring small differences in electrical potential.
2. An electrical resistor of fixed total resistance between two terminals, but with a third terminal attached to a slider that can make contact at any desired point along the resistance.
[L. potentia, power, + G. metron, measure]
potentiometer
(pō-tĕn″shē-ŏm′ĕ-tĕr)A voltmeter.
calibration potentiometer
A mechanically adjusted resistance used as a calibration control on many instruments. It adjusts a voltage or current within the device.