\ ˈnīs How to pronounce gneiss (audio) \

Definition of gneiss

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

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Other Words from gneiss

gneissic \ ˈnī-​sik How to pronounce gneissic (audio) \ adjective
gneissoid \ ˈnī-​ˌsȯid How to pronounce gneissoid (audio) \ adjective
gneissose \ ˈnī-​ˌsōs How to pronounce gneissose (audio) \ adjective

Examples of gneiss in a Sentence

Recent Examples on the Web Buried in the earth were remnants of fragments of the same type of rock that makes up the Callanish stones—called Lewisian gneiss—which, unlike the peat and clays that stud the island’s dirt, are poor conductors of electricity. Katherine J. Wu, Smithsonian Magazine, "Massive Lightning Strike May Have Inspired This Scottish Stone Circle," 31 Dec. 2019 The near-seamless local bedrock, a type of rock called gneiss, is geologically stable and keeps water out. Andrew Curry, The Atlantic, "What Lies Beneath," 11 Sep. 2017 The gneiss was also used to create the low stone walls that bring definition to the estate’s exterior walkways. USA TODAY, "Hawk Hill, contemporary 1960s home towering over N.Y.'s Hudson River, for sale," 11 Aug. 2017 The falls are a 62-foot-high double-plunge along a granitic gneiss ledge. Peter Marteka,, "Connecticut's Waterfalls: Five Beauties Not To Miss," 17 May 2017

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.

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First Known Use of gneiss

1757, in the meaning defined above

History and Etymology for 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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Time Traveler for gneiss

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The first known use of gneiss was in 1757

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Last Updated

14 Jan 2020

Cite this Entry

“Gneiss.” Dictionary, Merriam-Webster, Accessed 28 Feb. 2020.

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Rhyming Dictionary: Words that rhyme with gneiss Encyclopedia article about gneiss

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