Currency pairs comprised of major currencies that do not pair with the US dollar are called cross pairs: EUR/GBP, GBP/JPY, CHF/GBP and so on.
Three more national currencies are common in trading forex - the New Zealand dollar, the Canadian dollar and the Australian dollar. Pair them to the US dollar and you have a group of forex minors: NZD/USD, CAD/USD and AUD/USD.
All other currency pairs in forex trading are generally referred to as exotic and account for less than 10% of all foreign exchange transactions.