maficPronunciation: /ˈmafɪk/Definition of mafic adjective Geology relating to or denoting a group of dark-coloured, mainly ferromagnesian minerals such as pyroxene and olivine. Often contrasted with felsic.Origin: early 20th century: blend of magnesium and a contracted form of ferricmafic in other Oxford dictionaries Definition of mafic in the US English dictionary
