Help support Wordnik by adopting your favorite word!

Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A gneiss derived from an igneous rock.

from The Century Dictionary and Cyclopedia

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

Etymologies

ortho- +‎ gneiss (Wiktionary)

Examples

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.