Definition of millivoltmeter in English:

millivoltmeter

noun

Electricity
  • An instrument for measuring voltages of the order of millivolts.

Origin

Early 20th century. From milli- + voltmeter, after millivolt.

Pronunciation

millivoltmeter

/ˌmɪlɪˈvəʊltˌmiːtə//ˌmɪlɪˈvɒltˌmiːtə/