dipartite
/ˌdɪpɑːrˈtaɪt/Definitions
1. verb
to divide or separate something into two parts, especially by a common boundary or line
“The country was dipartite in the 19th century, with the north controlled by the French and the south by the Spanish.”
2. noun
a place or area where two countries or territories meet and have a common boundary
“The dipartite region between France and Spain has been a subject of dispute for centuries.”
3. adjective
relating to or dividing a place or area into two parts, especially by a common boundary or line
“The dipartite border between the two countries has been the subject of diplomatic efforts to resolve the conflict.”