polycyclic aromatic hydrocarbonpolycyclic aromatic hydrocarbon
any of a group of common, very stable, aromatic hydrocarbons formed by the incomplete burning of any substance containing carbon, esp. coal, oil, wood, or tobacco: many are known or suspected carcinogens: abbrev. PAH
polycyclic aromatic hydrocarbon
Any of a class of carcinogenic organic molecules that consist of three or more benzene rings and are commonly produced by fossil fuel combustion. Also called polynuclear aromatic hydrocarbon .