Quadra'ntal. adj. [from quadrant.] Included in the fourth part of a circle.
To fill that space of dilating, proceed in strait lines, and dispose of those lines in a variety of parallels: and to do that in a quadrantal space, there appears but one way possible; to form all the intersections, which the branches make, with angles of forty-five degrees only. Derham's Physico-Theol.