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 \ˈnī-ˌsȯid\ adjective

gneissose

play \ˈnī-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


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