Coss, n. [It. cosa.] A thing (only in phrase below).
Rule of Coss, an old name for Algebra. [It. regola di cosa rule of thing, the unknown quantity being called the cosa, or the thing.]
Webster's Dictionary 1913
Coss, n. [It. cosa.] A thing (only in phrase below).
Rule of Coss, an old name for Algebra. [It. regola di cosa rule of thing, the unknown quantity being called the cosa, or the thing.]