Dictionary
cat•i•on
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.