THERMONUCLEAR Meaning of THERMONUCLEAR in English thermonuclear BrE AmE ˌθɜːm əʊ ˈnjuːk li‿ə ◂ § -ˈnuːk- AmE ˌθɝːm oʊ ˈnuːk li‿ ə r -ˈnjuːk-, !!-jəl ə r Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012