Source : Webster's Revised Unabridged Dictionary (1913)

Rouge \Rouge\, n. [F.]
   1. (Chem.) A red amorphous powder consisting of ferric oxide.
      It is used in polishing glass, metal, or gems, and as a
      cosmetic, etc. Called also {crocus}, {jeweler's rouge},
      etc.

   2. A cosmetic used for giving a red color to the cheeks or
      lips. The best is prepared from the dried flowers of the
      safflower, but it is often made from carmine. --Ure.