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gneiss
Definitions
[nʌɪs], (Noun)
Definitions:
- a metamorphic rock with a banded or foliated structure, typically coarse-grained and consisting mainly of feldspar, quartz, and mica
Phrases:
Origin
:
mid 18th century: from German, from Old High German gneisto ‘spark’ (because of the rock's sheen)
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definition by Oxford Dictionaries