Anode (noun)

  1. The electrode of a device, such as a battery or a cathode ray tube, through which electric current flows into the device.
  2. The electrode that is positively charged in an electrolytic cell or an electron tube.


Late 19th century, from greek anodos (way up), from ana- (up) + hodos (way).


  1. The anode is the electrode where oxidation occurs.
  2. An anode is the positive electrode in an electrolytic cell.
  3. The anode is the electrode where electrons flow into a device.
  4. Anode corrosion is a common problem in batteries.
  5. Anodes in cathode ray tubes are made of materials that emit electrons when heated.
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