Dictionary

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 \-ˌsid\ adjective
gneiss·ose \-ˌsōs\ adjective

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

Rhymes with GNEISS

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