coss
Coss (ks), n. Etym: [Cf. Pers. k a road measure of about two miles; or Skr. kr.] Defn: A Hindoo measure of distance, varying from one and a half to two English miles. Whitworth. Coss, n. Etym: [It. cosa.] Defn: A thing (only in phrase below). Rule of Coss, an old name for Algebra. Etym: [It. regola di cosa rule of thing, the unknown quantity being called the cosa, or the thing.]