WordNet (r) 3.0 (2006):

electric meter
    n 1: a meter for measuring the amount of electric power used
         [syn: electric meter, power meter]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "electric meter":
   VOM, VTVM, ammeter, ampere-hour meter, coulometer, dynamometer,
   expansion ammeter, faradmeter, galvanometer, hysteresis meter,
   magnetometer, megohmmeter, mhometer, milliammeter,
   moving-coil meter, ohmmeter, potentiometer, thermoammeter,
   thermocouple, thermoelectrometer, variometer, voltameter,
   voltmeter