o ‧ me ‧ ga /ˈəʊməɡə, ˈəʊmɪɡə $ oʊˈmeɡə, -ˈmiː-, -ˈmeɪ-/ BrE AmE noun
[ Date: 1500-1600 ; Language: Greek ; Origin: o mega 'big o' ]
the last letter of the Greek alphabet
o ‧ me ‧ ga /ˈəʊməɡə, ˈəʊmɪɡə $ oʊˈmeɡə, -ˈmiː-, -ˈmeɪ-/ BrE AmE noun
[ Date: 1500-1600 ; Language: Greek ; Origin: o mega 'big o' ]
the last letter of the Greek alphabet
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012