An electrode is a conductor by which an electric current enters or leaves an electrolyte or an electron tube. The positive electrode is called the anode and the negative electrode is called the cathode. The term electrode (from the Greek, hodos, a way), was introduced by Faraday to denote the wires or other terminals by which electricity either enters or leaves a body which is undergoing electrolytic decomposition. He called the electrode at which the current enters the anode (ana, upwards), and the electrode at which the current leaves the electrolyte the cathode (kata, downwards). Research Electrode
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