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gneiss

UK:^*^*UK and possibly other pronunciationsUK and possibly other pronunciations/naɪs/US:USA pronunciation: respellingUSA pronunciation: respelling(nīs)

gneiss (nīs),USA pronunciation n.

Rocksa metamorphic rock, generally made up of bands that differ in color and composition, some bands being rich in feldspar and quartz, others rich in hornblende or mica.

German
1750–60

gneiss′ic, adj.

Collins Concise English Dictionary © HarperCollins Publishers::

gneiss /naɪs/ n

any coarse-grained metamorphic rock that is banded and foliated: represents the last stage in the metamorphism of rocks before melting

Etymology: 18th Century: from German Gneis, probably from Middle High German ganeist spark; related to Old Norse gneista to give off sparksˈgneissic, ˈgneissoid, ˈgneissose, gneiˈssitic adj

'gneiss' also found in these entries (note: many are not synonyms or translations):

gneissoid

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gneiss