demicanton
noun
demi·can·ton ˈde-mē-ˌkan-tᵊn 
-ˌtän
: one of the two divisions into which each of the three Swiss cantons Appenzell, Basel, and Unterwalden are separated
Word History
Etymology
French demi-canton, from demi- (from demi half) + canton
First Known Use
1853, in the meaning defined above