Exclave: A portion of a country which is separated from the main part and surrounded by politically alien territory.

But here’s the great part: “The same territory is an enclave in respect to the surrounding country and an exclave with respect to the country to which it is politically attached.”

(definition excerpted from Webster’s Revised Unabridged Dictionary, as referenced at Dictionary.com)

Lovely, isn’t it? Came up in the context of the territories of Liechtenstein:

While many of these Liechtensteinian fragments might be considered exclaves, most also border more than one other territory, and consequently only three can be considered enclaves…

[Strange Maps blog]