Cossical
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cossical — … Useful english dictionary
Cossic — Cos sic (k?s s?k), Cossical 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 (1579). [1913 Webster] … The Collaborative International Dictionary of English