Galvanoscope n. : An instrument or apparatus for detecting the presence of electrical currents, especially such as are of feeble intensity.

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Defination from the web:
galvanoscope from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... Learn more about "galvanoscope" and related topics at Britannica.com. Pronunciation Symbols. Share this entry: Link to this page: Cite this ...