IPA: /ˌɡæl.vəˈnɒm.ɪ.tər/
KK: /gælˈvænəˌmɪtər/
A device that measures small electric currents by using the effects of magnetism on a coil or needle.
The scientist used a galvanometer to measure the tiny electric current flowing through the circuit.
Galvanometer → It is formed from "galvano-" (from Italian *galvano*, meaning relating to electricity or galvanism, named after Luigi Galvani) and "-meter" (from Greek *metron*, meaning measure). The word refers to an instrument that measures electric current.
Think of 'galvano-' relating to electricity and '-meter' meaning to measure, so a galvanometer is a device that measures electric current.