Definition: Oil paint uses a binder or resin that is derived from a vegetable oil such as linseed or soya bean. It is for this reason that you can't take a paintbrush full of oil paint and rinse it off with water. Its that whole oil and water don't mix thing. The extremely knowledgable folks at Winsor & Newton tell us, "Oils are one of the great classic media, and have dominated painting for five hundred years. They remain popular for many reasons: their great versatility, offering the possibility of transparency and opacity in the same painting; the lack of color change when the painting dries; and ease of manipulation." Now you know.
Pronunciation: oyl • (noun)