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Mason-Dixon Line

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Ma·son-Dix·on Line (m

n-d

The boundary between Pennsylvania and Maryland, regarded as the division between free and slave states before the Civil War. It was established between 1763 and 1767 by the British surveyors Charles Mason (1730-1787) and Jeremiah Dixon (died 1777).

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Noun

Mason-Dixon line - the boundary between Maryland and Pennsylvania; symbolic dividing line between North and South before the American Civil War

Mason and Dixon line, Mason and Dixon's line

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