Is “Cation” a Scrabble word?
Yes
CATION
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Cation
/ˈkat.ʌɪ.ən/
noun
1.A positively charged ion, i.e. one that would be attracted to the cathode in electrolysis.