Käännettävä sana (suomeksi tai englanniksi):
Mason-Dixon Line (suomeksi)
- The boundary line between Pennsylvania and Maryland, as run before the Revolution (1764-1767) by two English astronomers named Charles Mason and Jeremiah Dixon, that, before abolition, defined the northern boundary of states in which slavery was permitted.
- The boundary between the free and slave states at the time of the American Civil War. Also alluded to in situations where political or cultural properties of the free and slave states are contrasted.