English Explanatory Dictionary

ultramafic

English dictionary entry

Meanings

adj
  1. Describing igneous rocks that contain magnesium and iron and only a very small amount of silica, such as are found in the Earth’s mantle.
noun
  1. A rock with such properties.

Word forms

ultramafic more ultramafic most ultramafic ultramafics

Etymology

From ultra- + mafic.

Synonyms

ultrabasic
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