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Felsic definition

fĕlsĭk
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.
adjective
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Relating to an igneous rock that contains a group of light-colored silicate minerals, including feldspar, feldspathoid, quartz, and muscovite.
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(mineralogy) Enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.
adjective
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A rock with such properties.
noun
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Other Word Forms

Noun

Singular:
felsic
Plural:
felsics

Origin of felsic

  • fel(dspar) s(ilica) –ic

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

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

    From Wiktionary