electroscopic


e·lec·tro·scope

E0081200 (ĭ-lĕk′trə-skōp′)n. An instrument used to detect the presence, sign, and in some configurations the magnitude of an electric charge by the mutual attraction or repulsion of metal foils or pith balls.
e·lec′tro·scop′ic (-skŏp′ĭk) adj.