amperemeter

from The Collaborative International Dictionary of English v.0.48

Ampere minute \Amp[`e]re minute\ and Ampere second \Amp[`e]re
second\ are sometimes similarly used.
   [Webster 1913 Suppl.] Amperemeter
Amperemeter \Am`p[`e]re"me`ter\, Amperometer \Am`pe*rom"e*ter\,
   n. [Amp[`e]re + meter.] (Physics)
   An instrument for measuring the strength of an electrical
   current in amp[`e]res.
   [1913 Webster]