gneiss
gneiss
noun \ˈnīs\Definition of GNEISS
: a foliated metamorphic rock corresponding in composition to a feldspathic plutonic rock (as granite)
— gneiss·ic \ˈnī-sik\ adjective
— gneiss·oid \-ˌsȯid\ adjective
— gneiss·ose \-ˌsōs\ adjective
See Origin 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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