I have checked on the NOAD, but I didn’t find the origin of Americana; it’s reported that it means things associated with the culture and history of America, especially the United States, but not the origin of the word.
I have a hypothesis, but it doesn’t explain why Americana is a plural noun. Does anybody know the origin of the word?
It comes from America and the suffix -ana, of which the NOAD says:
(forming plural nouns) denoting things
associated with a person, place, or
field of interest: Americana |
Origin: from the neuter plural of the Latin adjectival ending
I don’t have any examples in mind other than those above: Americana and Victoriana.