OCTO- Meaning of OCTO- in English octo- combining formwith stress-neutral suffix BrE AmE ¦ɒkt ə ʊ AmE ¦ɑːkt ə▷ — octosyllable ˈɒkt ə ʊ ˌsɪl əb ə l ˌ••ˈ••• AmE ˈɑːkt ə- Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012