MICROORGANISM Meaning of MICROORGANISM in English microorganism BrE AmE ˌmaɪk rəʊ ˈɔːɡ ə ˌnɪz ə m ˈ••ˌ•••• AmE \ -roʊ ˈɔːrɡ-▷ microorganism|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012