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Definition of: cathode
(kath′ōd) noun Electr.
The electrode through which negative ions leave a non-metallic conductor and toward which positive ions flow from the anode. It is negative for a battery, electrolytic bath, or a vacuum tube, but positive for a voltaic cell: also spelled kathode. [<Gk. kathodos a way down <kata- down + hodos road, way]
—ca·thod·ic (kə·thod′ik) or·i·cal adjective
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