Cathode

In chemistry a cathode is the electrode of an electrochemical cell at which reduction occurs. It comes from the Greek word κάθοδος meaning, 'going down'. In an electrolytic cell the cathode is negatively charged and in a galvanic cell the cathode is positively charged. The oppositely charged electrode in that same cell is referred to as the anode.

See also

• Battery
• Cathode ray tube
• Oxidation-reduction
• Electron tube
• Electrolysis