Su·me·ri·an 
(s-mîrē-ən, -mĕr-)
(s-mîrē-ən, -mĕr-)adj.
Of or relating to ancient Sumer or its people, language, or culture.
n.
1. A member of an ancient people, probably of non-Semitic origin, who established a nation of city-states in Sumer in the fourth millennium BC that is one of the earliest known historic civilizations.
2. The language of the Sumerians, of no known linguistic affiliation.