Relating to or containing a group of light-colored silicate minerals that occur in igneous rocks, including minerals of the feldspathoid group and the minerals quartz, feldspar, and muscovite.
Origin of felsicfel(dspar) + s(ilica) + –ic.
(comparative more felsic, superlative most felsic)
- (mineralogy) Enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.
- A rock with such properties.