Usonian
Syllabification: (U·so·ni·an)
Pronunciation: /yo͞oˈsōnēən/
Definition of Usonian
adjective
noun
Origin:
early 20th century: an acronym from United States + -onian after Amazonian, Devonian, etc.
early 20th century: an acronym from United States + -onian after Amazonian, Devonian, etc.