: the ion in an electrolyzed solution that migrates to the anode; broadly: a negatively charged ion
Atom or group of atoms carrying a negative electric charge, indicated by a superscript minus sign after the chemical symbol. Anions in a liquid subjected to an electric field migrate toward the positive electrode (anode). Examples include hydroxyl (OH; seehydroxide), carbonate (CO2), and phosphate (PO3). See alsoion; comparecation.