A conductor through which electricity enters or leaves an object, substance, or region.
- Oxidation of the dye molecule injects electrons into the semiconducting electrode.
- At the two ends of the conductor are the electrodes, which gather and disperse the electrons.
- When electricity was applied to the electrodes, rays appeared to come from the cathode.
Mid 19th century: from electric + Greek hodos 'way', on the pattern of anode and cathode.
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