G0026000 (găl′və-nə-skōp′, găl-văn′ə-)n. An instrument used to detect the presence and determine the direction of electric currents by the deflection of a magnetic needle.gal′va·no·scop′ic(-skŏp′ĭk) adj.gal′va·nos′co·py(găl′və-nŏs′kə-pē) n.MedicalSeegalvanoscope