bootheel

[boot-heel]
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noun (sometimes initial capital letter)

an area of SE Missouri where the Missouri-Arkansas border dips southward forming a rectangular-shaped extension of the state.

Origin of bootheel

boot1 + heel1; so called from the shape on the map; cf. panhandle1, panhandle2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bootheel

Historical Examples of bootheel