Obs. rare. [f. QUADRANT sb.2 + -AL.] a. Square; having a square base.
b. Astron. QUADRANT a. 1 b.
1665. J. Gadbury, Lond. Deliv. Predicted, i. 4. The Conjunctional, Opposite, or Quadrantal Rays of Jupiter.
1690. Leybourn, Curs. Math., 317. Let A B C D E be a Quadrantal Pyramis, (for a Pyramis is denominated from the Number of the equal Sides of the Base thereof, as here four…).
