Noun
a thin film of oil floating on top of water (especially crude oil spilled from a ship)
Source: WordNetThe Human Oil Slick. Keith Olbermann
Energy The oil slick just off the Louisiana coast on April 30, 2010. Source: Internet
Observe that the sand and rocks have been darkened by oil slick up to the high-water line. Source: Internet
She was particularly drawn to math and science, and first studied colors of an oil slick, thin films, and reflected light. Source: Internet
I currently have an oil slick look created with manic panic colors and my natural color. Source: Internet
Sea turtles, manatees, and dolphins still need to come up through the oil slick for air; eye irritations are the least of the problems they encounter. Source: Internet