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Pronunciation: (kat'ī"un, -on), [key]
n. Physical Chem.
1. a positively charged ion that is attracted to the cathode in electrolysis.
2. any positively charged atom or group of atoms (opposed to anion). Also,kation.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

Catilinecationic detergent
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