vicinal
/ˈvɪsɪnəl/adjective
1- rare neighbouring; adjacent〈罕〉邻近的; 毗邻的, 邻接的。
1.1
- (especially of a railway or road) serving a neighbourhood; local（尤指铁路、公路）为本地服务的; 地方的。
1.2
- Chemistry relating to or denoting substituents attached to adjacent atoms in a ring or chain【化】连（位）的。
词源
early 17th cent.: from French， or from Latin vicinalis, from vicinus 'neighbour'.