Noun
petrodollar (plural petrodollars)
(oil industry, chiefly in the plural, also attributively) Money (either notionally or specifically in dollars or other currencies) earned from the sale of oil, often especially as considered among a national economy's principal revenue streams.
For most petrodollar states, the future is bleak. Source: Internet
The petrodollar system has been growing unstable as well. Source: Internet