Water color : 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.

Water color : A picture painted with such colors.

Example:


Taxonomy
paint, paper, watercolor, brush, pigment, painting, watercolor painting, tuft, watercolor paints, painters, watercolor painters, hairs, brush strokes, sheets, the 19th century, pans, texture, pigment particles.

Defination from the web:
water-soluble pigments. ... The California Water Color Society, founded in 1921 and later renamed the National Watercolor Society, sponsored important exhibitions of their work. ...