Mason-Dixon Line
/ˈmeɪsənˈdɪksən/noun
- (in the US) the boundary between Maryland and Pennsylvania, taken as the northern limit of the slave-owning states before the abolition of slavery（美国）梅森-狄克森线（马里兰州和宾夕法尼亚州之间的边界线, 奴隶制废除前是蓄奴州北边界线）。
词源
named after Charles Mason and Jeremiah Dixon, the 18th-cent. English astronomers who surveyed it in 1763-7.