Felsic Definition

fĕlsĭk
adjective
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.
American Heritage
(mineralogy) Enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.
Wiktionary
noun
A rock with such properties.
Wiktionary

Other Word Forms of Felsic

Noun

Singular:
felsic
Plural:
felsics

Origin of Felsic

  • Blend of feldspar and silica, with the suffix -ic.

    From Wiktionary

  • fel(dspar) s(ilica) –ic

    From American Heritage Dictionary of the English Language, 5th Edition

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