ion

(i’on), n. [¢ Gr. idv, neut. idv, ppr. of tévar, L. ire, go: see iter.] One of the elements of an electrolyte, or compound body undergoing electrolyzation. Those elements of an electrolyte which are evolved at the anode are termed anions, and those which are evolved at the cathode cations, and when these are spoken of together they are called ions. Thus water when electrolyzed evolyes two ions, oxygen and hydrogen, the former being an anion, the latter a cation. -ion. [ME. -ion, -ioun, -iwn (-on, -wn),