Search Result for "oil slick":
Wordnet 3.0

NOUN (1)

1. a thin film of oil floating on top of water (especially crude oil spilled from a ship); 



The Collaborative International Dictionary of English v.0.48:

oil slick \oil" slick`\ n.
   A layer of oil floating on water; -- usually petroleum or
   fuel oil which has leaked from a ship.
   [PJC]


WordNet (r) 3.0 (2006):

oil slick
    n 1: a thin film of oil floating on top of water (especially
         crude oil spilled from a ship)