cationPronunciation: /ˈkatʌɪən/Definition of cation noun Chemistry a positively charged ion, i.e. one that would be attracted to the cathode in electrolysis. The opposite of anion.Derivatives cationicPronunciation: /katʌɪˈɒnɪk/ adjective Origin: mid 19th century: from cata- 'alongside' or from cathode, + ioncation in other Oxford dictionaries Definition of cation in the US English dictionary
