mafic

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Pronunciation

• (British) IPA: /ˈmafɪk/
• (America) IPA: /ˈmeɪfɪk/, /ˈmæfɪk/

Adjective

mafic

1. (geology) Describing rocks, such as silicate minerals, magmas, and volcanic and intrusive igneous rocks, which contain relatively high concentrations of magnesium and iron.

   Synonyms: ferromagnesic, basic

   Antonyms: felsic, acidic

   • 2004, Richard Fortey, The Earth, Folio Society 2011, p. 60:

     As a whole, rocks of this type are referred to as mafic, because of the importance of magnesium and iron in their composition.

Noun

mafic (plural mafics)

1. A rock with such properties.

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