adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A rock with such properties.

Adjective

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

   "Much of the southern half of the southeastern body is a mafic syenite, slightly more felsic than the shonkinite."

Synonyms

All synonyms

basicbasicferromagnesicsimatic

Antonyms

All antonyms

acidicfelsic

Example

More examples

"Much of the southern half of the southeastern body is a mafic syenite, slightly more felsic than the shonkinite."

Etymology

Blend of magnesium + ferric.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.