exclave
A portion of a country's territory not connected to the main part.
Example
“Alaska and Kaliningrad are both examples of exclaves.”
Other meanings
A detached part of an organ, as of the pancreas, thyroid (accessory thyroids), or other gland.
Where this comes from
This definition is adapted from “exclave” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.