OMICRON Meaning of OMICRON in English omicron BrE AmE ə ʊ ˈmaɪk rɒn -r ə n; ˈɒm ɪk- AmE \ ˈɑːm ə krɑːn ˈoʊm- (*)▷ omicron|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012