Ser·bo-Cro·a·tian 
(sûr′bō-krō-āshən)
(sûr′bō-krō-āshən)n.
1. The closely related South Slavic languages of Croatia, Bosnia and Herzegovina, Montenegro, and Serbia when considered as a single language.
2. A native speaker of Serbo-Croatian.
Ser′bo-Cro·atian adj.