a. Obs. [f. as prec. + -AL.] = prec.
1571. Digges, Pantom., IV. Pref. T j. The ingeniouse Student, hauing any meane taste of cossicall numbers, shall finde them playne and easie.
1701. Jeake, Body of Arith., 284. In substracting Cossical Fractions.
[1801. Strutt, Sports & Past., IV. ii. 278, note. Certain … algebraic figures, called cossical signings, which increased the intricacy of the game.]
