Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An igneous rock consisting essentially of plagioclase and either leucite or nephelite, or both.

from the GNU version of the Collaborative International Dictionary of English

  • n. An igneous rock consisting essentially of plagioclase and either leucite or nephelite, or both.

from The Century Dictionary and Cyclopedia

  • n. The name of certain modern volcanic rocks of rather varied and uncertain composition.

Etymologies

Ancient Greek (Wiktionary)

Examples

  • Trenches were cut perpendicular to the strike of lithogic layering in a strongly altered tephrite/skarn breccia sequence and sampled an area of outcrop approximately 180 x 180 meters in size.

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