Araucanian
noun
Arau·ca·ni·an ə-ˌrau̇-ˈkä-nē-ən 
ˌa-ˌrȯ-ˈkā-
ˌa-ˌrȯ-ˈkā- variants or less commonly Araucan
ə-ˈrau̇-kən
1
: a member of a group of Indian peoples of south central Chile and adjacent regions of Argentina
2
: the language of the Araucanian people that constitutes an independent language family
Araucanian adjective
Word History
Etymology
Spanish araucano (from Arauco, earlier Rauco, Mapuche "province" of 16th-century Chile + -ano -an entry 1) + -ian
First Known Use
1777, in the meaning defined at sense 1