mafic

maf.ic

adj.（形容词）
Containing or relating to a group of dark-colored minerals, composed chiefly of magnesium and iron, that occur in igneous rocks.
铁镁质的：含有或与一组深色矿物有关的，主要由镁和铁组成，出现在火成岩中的

来源：
ma(gnesium)
ma(gnesium)
Latin ferrum [iron]
拉丁语 ferrum [铁]
-ic
-ic