HETEROCYCLIC Meaning of HETEROCYCLIC in English heterocyclic BrE AmE ˌhet‿ ə r əʊ ˈsaɪk lɪk ◂ -ˈsɪk- AmE \ ˌhet̬ ə roʊ- Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012