NUCLEONIC Meaning of NUCLEONIC in English nucleonic BrE AmE ˌnjuːk li ˈɒn ɪk ◂ § ˌnuːk- AmE ˌnuːk li ˈɑːn ɪk ◂ ˌnjuːk- ▷ nucleonic|s s Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012