̷ ̷ˈ ̷ ̷ ̷ ̷+ˌskōp noun
Etymology: probably from French électroscope, from électro- electr- + -scope
: any of various instruments for detecting the presence of an electric charge on a body, for determining whether the charge is positive or negative, or for indicating and measuring intensity of radiation by means of the motion imparted to charged bodies (as strips of gold leaf) suspended from a metal conductor within an insulated chamber — compare electrometer