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cation

noun [C]
 
 
/ˈkæt.aɪən/ specialized

Definition

in chemistry, an ion (= type of atom) that has a positive electric charge and therefore moves towards the cathode (= negative part of electric cell) during electrolysisAtoms, molecules and sub-atomic particles
(Definition of cation noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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