D defs.my
Entry 2 senses · 2 variants Webster, 1913

Coss

/(kŏs)/ · IPA /kɒs/
01 n. A Hindoo measure of distance, varying from one and a half to two English miles.
  1. 1.
    A Hindoo measure of distance, varying from one and a half to two English miles.
02 n. A thing (only in phrase below).
  1. 1.
    A thing (only in phrase below).
Phrases & compounds
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.]