Meaning of アマゾン in Japanese

The Amazon River meanders through northern Brazil.

I've ordered a book from Amazon.com.

The Amazon is the second longest river in the world after the Nile.

The Amazon is fed by a large number of tributaries.

There are so-called primitive cultures in the jungles of the Amazon and on the island of New Guinea, and there are so-called advanced cultures in Europe, Asia, and Africa, but the languages of these cultures are all equally advanced and complex.