gneiss

noun \ ˈnīs \

Definition of gneiss

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

gneissic

play \ˈnī-sik\ adjective

gneissoid

play \ˈnī-ˌsȯid\ adjective

gneissose

play \ˈnī-ˌsōs\ adjective

Recent Examples of gneiss from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'gneiss.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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


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