noun Etymology: German Gneis, alteration of Middle High German gneiste spark, from Old High German gneisto; akin to Old English fȳrgnāst spark Date: 1757 a foliated metamorphic rock corresponding in composition to a feldspathic plutonic rock (as granite), ~ic adjective ~oid adjective ~ose adjective
GNEISS
Meaning of GNEISS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012