Electrometer \E`lec*trom"e*ter\, n. [Electro- + -meter: cf. F. ['e]lectrom[`e]tre.]

(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).

Balance electrometer. See under Balance.

Source: Webster's Revised Unabridged Dictionary (1913)