NUCLEUS Meaning of NUCLEUS in English nucle|us BrE AmE ˈnjuːk li‿|əs § ˈnuːk-, !!-jəl- AmE ˈnuːk- ˈnjuːk-, , !!-jəl- ▷ nucle|i aɪ iː Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012