cation
noun
cat·ion ˈkat-ˌī-ən 
ˈka-(ˌ)tī-ən
: the ion in an electrolyzed solution that migrates to the cathode
broadly : a positively charged ion
Word History
Etymology
Greek kation, neuter of katiōn, present participle of katienai to go down, from kata- cata- + ienai to go — more at issue entry 1
First Known Use
1834, in the meaning defined above
Medical Definition
cation
noun
cat·ion ˈkat-ˌī-ən
: the ion in an electrolyzed solution that migrates to the cathode
broadly : a positively charged ion