cath·odeBrE/ˈkæθəʊd/NAmE/ˈkæθoʊd/noun (specialist) theelectrode in an electrical device where reduction occurs; the negative cell and the positive electrode cell and the positive electrodeinanelectrolyticcellandthepositiveelectrodeinabattery阴极；（电解池的）负极；（原电池的）正极➡ compareanode