a. Now rare. [f. as prec. + -AL.] = QUADRATIC a.
1674. Jeake, Arith. (1696), 645. The Quotient shall be squaredly Quadratical.
1690. Leybourn, Curs. Math., 342. To receive as many Cubical Points, as the Co-efficient doth Quadratical.
1880. Gilbert, Pirates Penzane. I understand equations, both the simple and quadratical.
Hence Quadratically adv. (Cent. Dict.)
