ultramafic en · ADJ
Etymology
From ultra- + mafic.
Meanings
- 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.
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| most ultramafic | Degree=Sup | lexicographic | |
| more ultramafic | Degree=Cmp | lexicographic |