MAGNESIUM Meaning of MAGNESIUM in English magnesium BrE AmE mæɡ ˈniːz i‿əm məɡ-, -ˈniːʒ ə m, -ˈniːs i‿əm, -ˈniːʃ ə m ▶ mag ˌ nesium hy ˈ droxide BrE AmE Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012