Paint in which a drying oil is the vehicle.
Painting medium in which ground pigment is bound with oil, usually linseed.
Oil paint was in decorative use as early as the 5th century, but its artistic application is usually credited to the early-15th-century Flemish painter, Jan van Eyck. Passing from Flanders to Rome, it quickly succeeded tempera as the standard medium. Capable of the greatest flexibility and luminosity, oil paint has since the 16th century been considered preeminent among painting media, although acrylic paint may prove in time to be a rival.