UPSILON Meaning of UPSILON in English upsilon BrE AmE juːp ˈsaɪl ən uːp-, ʊp-, -ɒn; ˈjuːps ɪl ən, ˈʌps-, -ɒn AmE \ ˈuːps ə lɑːn ˈjuːps-, ˈʌps-, - ə l ən (*)▷ upsilon|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012