La Tène
adjective
lä-ˈten 
-ˈtān
-ˈtān : of or relating to the later period of the Iron Age in Europe assumed to date from 500 b.c. to a.d. 1
Word History
Etymology
La Tène, shallows of the Lake of Neuchâtel, Switzerland
First Known Use
1882, in the meaning defined above