Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

gneiss

play
noun \ˈnīs\

Definition of gneiss

  1. :  a foliated metamorphic rock corresponding in composition to a feldspathic plutonic rock (as granite)

gneissic

play \ˈnī-sik\ adjective

gneissoid

play \-ˌsȯid\ adjective

gneissose

play \-ˌsōs\ adjective


Origin and Etymology of gneiss

German Gneis, alteration of Middle High German gneiste spark, from Old High German gneisto; akin to Old English fȳrgnāst spark


First Known Use: 1757

Rhymes with gneiss


Learn More about gneiss


Seen and Heard

What made you want to look up gneiss? Please tell us where you read or heard it (including the quote, if possible).