One of the mysteries of the English language finally explained.
1Relating to or produced by photo-galvanography. Now rare (chiefly historical).
2Relating to or utilizing the generation of a potential difference between two electrodes by a photochemical reaction in the electrolyte containing them.
3More widely: relating to or involving the generation of a potential difference or an electric current as a result of incident light.
Mid 19th century. From photo- + galvanic.
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