Definition of mafic in English:


Line breaks: mafic
Pronunciation: /ˈmafɪk


Relating to or denoting a group of dark-coloured, mainly ferromagnesian minerals such as pyroxene and olivine. Often contrasted with felsic.
More example sentences
  • Variably serpentinized Devonian mafic and ultramafic intrusive rocks occur in the western and northern parts of the map area.
  • The alternating bands of mafic and felsic minerals are a striking and distinctive feature of all gneisses.
  • If such adiabatic freezing were to control the ascent of hydrous mafic magmas, basalts would probably never erupt in volcanic arcs.


early 20th century: blend of magnesium and a contracted form of ferric.

Definition of mafic in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day rebuff
Pronunciation: rɪˈbʌf
reject (someone or something) in an abrupt manner…