Adena
adjective
Ade·na
ə-ˈdē-nə
: of or belonging to a prehistoric culture centered in the Mississippi valley marked by large conical burial mounds and thought to precede the Hopewell culture though in some areas it lasted later than Hopewell
Word History
Etymology
after Adena, town in Jefferson county, Ohio, its type station
First Known Use
1901, in the meaning defined above