De Quincey's distinction between the literature of knowledge and that of power is our line of demarkation.
He could see no line of demarkation where it ended at the top.
There is no distinct line of demarkation between any of these correlative terms.
There was a clear line of demarkation separating the domains of religion and philosophy.
No line of demarkation is drawn between man and beast; all are great beings endowed with wonderful attributes.
In truth, no absolute line of demarkation, no impassable barrier, subsists.
The Euphrates forms pretty nearly the line of demarkation between them.
They determined to make a final and decisive line of demarkation, and to let that be conclusive.
The line of demarkation was broad, distinct, and unmistakable in those days.
But the line of demarkation between the educated and the half-educated is just as clear in New York as in London.
c.1752, from Spanish linea de demarcacion or Portuguese linha de demarcaçao, name of the line laid down by Pope Alexander VI, May 4, 1493, dividing the New World between Spain and Portugal on a line 100 leagues west of the Cape Verde Islands. Applied from 1801 to other lines dividing regions. From Spanish de- (see de-) + marcar "to mark the boundaries of," from a Germanic source (see mark (n.1)).