Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. felsite

from the GNU version of the Collaborative International Dictionary of English

  • n. Felsite.

from The Century Dictionary and Cyclopedia

  • n. A finely granular or cryptocrystalline admixture of quartz and orthoclase; felsite.

Etymologies

petro- +‎ silex (Wiktionary)

Examples

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