There are the degrees of direction of line, curvilinear or angular.
The same principle is true of designs upon the curvilinear plan.
It would be the same with the quadrature of curvilinear areas.
Who can decide between rectilinear and curvilinear geometry?
Who shall decide between rectalinear and curvilinear geometry?
Out of "Brandt" I defy you to get any curvilinear ...