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Polycyclic aromatic hydrocarbons

hydrocarbons composed of multiple aromatic rings

Pronunciation
/ˌpɒlɪˈsɪklɪk arəˈmatɪk ˌhʌɪdrəʊˈkɑːbənz/
/ˌpɑliˈsaɪklɪk ˌɛrəˈmædɪk ˌhaɪdroʊˈkɑrbənz/