English
Proper noun
en-proper noun|sg=Mason-Dixon line|Line
- The boundary line between Pennsylvania and Maryland, as run before the Revolution (1764-1767) by two English astronomers named Charles Mason and Jeremiah Dixon.
- The boundary between the free and slave states at the time of the American Civil War.
See also
Confederacy
w:Mason-Dixon line|Wikipedia article on the Mason-Dixon Line
webster
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