panhandle

A salient (also known as a panhandle or bootheel) is an elongated protrusion of a geopolitical entity, such as a subnational entity or a sovereign state.
While similar to a peninsula in shape, a salient is most often not surrounded by water on three sides. Instead, it has a land border on at least two sides and extends from the larger geographical body of the administrative unit.
In American English, the term panhandle is often used to describe a relatively long and narrow salient, such as the westernmost extensions of Florida and Oklahoma, or the northernmost portion of Idaho. Another term is bootheel, used for the Missouri Bootheel and New Mexico Bootheel areas.

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