cossical
Cos"sic (ks"sk), Cos"sic*al (-s-kal), a. Etym: [It. cossico. See 2d Coss.] Defn: Of or relating to algebra; as, cossic numbers, or the cossic art. [Obs.] "Art of numbers cossical." Digges (1579).
Cos"sic (ks"sk), Cos"sic*al (-s-kal), a. Etym: [It. cossico. See 2d Coss.] Defn: Of or relating to algebra; as, cossic numbers, or the cossic art. [Obs.] "Art of numbers cossical." Digges (1579).