Main Entry: vic·i·nal

Pronunciation: \ˈvi-sə-nəl, ˈvis-nəl\

Function: adjective

Etymology: Latin vicinalis, from vicinus neighbor, from vicinus, adjective, neighboring

Date: circa 1623

1 : of or relating to a limited district : local
2 : of, relating to, or substituted in adjacent sites in a molecule <a vicinal disulfide group>