Medicine Line

Etymology
First known attestation from 1880 where the term was described as being used "because no matter what [the Indians] have done [committed crimes] upon one side they feel perfectly secure after having arrived upon the other". A synonymous term which was attested earlier is from 1869 and ostensibly a calque of a  term transcribed as "pejuta canku". Unrecorded use of the term or a similar one may date back more than a century earlier than the first attestation. See also.

Proper noun

 * 1)  The Canada-United States border; the : a circle of latitude that is 49° north of Earth's equator.

Usage notes
Primarily used in the context of discussions of Native Americans or First Nations people.