Electrometer n. (Physics) An instrument for measuring the quantity or intensity of electricity; also, sometimes, and less properly, applied to an instrument which indicates the presence of electricity (usually called an electroscope).
... eye watchful in minutest observation of nature; and her taste, a perfect electrometer. It bends, protrudes, and draws in, at subtlest ... — Biographia Epistolaris, Volume 1. • Coleridge, ed. Turnbull
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