单词	polynuclear
释义	polynuclear adjective poly·​nu·​cle·​ar ˌpä-lē-ˈnü-klē-ər  -ˈnyü-,  nonstandard  -kyə-lər : chemically polycyclic especially with respect to the benzene ring —used chiefly of aromatic hydrocarbons that are important as pollutants and possibly as carcinogens Example Sentences Recent Examples on the Web There was evidence of total petroleum hydrocarbons, though the summary did not list which specific chemicals, and polynuclear aromatic hydrocarbons – chemicals that occur naturally in coal, crude oil, and gasoline – in the soil. Kaitlin Durbin, cleveland, 17 Aug. 2022 Word History Etymology International Scientific Vocabulary First Known Use 1908, in the meaning defined above Phrases Containing polynuclear polynuclear aromatic hydrocarbon polynuclear aromatic hydrocarbon Medical Definition polynuclear adjective poly·​nu·​cle·​ar ˌpäl-i-ˈn(y)ü-klē-ər  : chemically polycyclic especially with respect to the benzene ring
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