Webster’s Revised Unabridged Dictionary · 1913
Cossic
Cos′sic (k?s′s?k), Cos′sic·al (-s?- kal), a. [It. cossico. See 2d Coss.] Of or relating to algebra; as, cossic numbers, or the cossic art. [Obs.] "Art of numbers cossical." Digges.
Webster’s Revised Unabridged Dictionary · 1913
Cos′sic (k?s′s?k), Cos′sic·al (-s?- kal), a. [It. cossico. See 2d Coss.] Of or relating to algebra; as, cossic numbers, or the cossic art. [Obs.] "Art of numbers cossical." Digges.