\Wa"ter col`or\ (Paint.)
1. A color ground with water and gum or other glutinous
   medium; a color the vehicle of which is water; -- so
   called in distinction from {oil color}.
Note: It preserves its consistency when dried in a solid
      cake, which is used by rubbing off a portion on a
      moistened palette. Moist water colors are water colors
      kept in a semifluid or pasty state in little metal
      tubes or pans.
2. A picture painted with such colors.