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(Chemistry) chem a series of the metals, together with hydrogen, ranged in the order of their electrode potentials
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|Noun||1.||electromotive series - a serial arrangement of metallic elements or ions according to their electrode potentials determined under specified conditions; the order shows the tendency of one metal to reduce the ions of any other metal below it in the series|
series - similar things placed in order or happening one after another; "they were investigating a series of bank robberies"