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- noun an instrument for measuring (in amperes) the electrical current flow in a circuit
- An instrument for measuring the rate of ampere flow through an electric circuit.
- Abbreviation of ampere meter. An instrument graduated in amperes, or fractions/multiples of amperes, which is utilized to measure and indicate the magnitude of electric currents. Different ammeters may be used for measuring DC and/or AC, and such instruments may employ any of various methods for detection, depending on the specific needs.
- synonymampere meter