OLIGOCENE Meaning of OLIGOCENE in English Oligocene BrE AmE ˈɒl ɪ ɡəʊ siːn ɒ ˈlɪɡ əʊ- AmE \ ˈɑːl ɪ ɡoʊ- ˈoʊl-; ə ˈlɪɡ ə- Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012