umls-concept:C0057761 | skos:definition | NCI: A yellowish aromatic hydrocarbon consisting of five fused rings formed by the incomplete burning of organic matter. Dibenz[a,j]acridine is primarily found in gasoline exhaust, petroleum refinery incinerator emissions, coal combustion emissions, cigarette smoke and coal tar pitch. This substance is used only for research purposes. Dibenz[a,j]acridine is reasonably anticipated to be a human carcinogen. (NCI05) | lld:umls |