Definitions

from The Century Dictionary.

  • noun In petrography, a name given by Rosenbusch (1898) to gneiss derived from igneous rocks: opposed to paragneiss.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun geology A gneiss derived from an igneous rock.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

ortho- +‎ gneiss

Examples

Comments

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