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greisen
Definitions
[ˈɡrʌɪz(ə)n], (Noun)
Definitions:
- a light-coloured rock containing quartz, mica, and fluorine-rich minerals, resulting from the alteration of granite by hot vapour from magma
Phrases:
Origin
:
late 19th century: from German, probably a dialect word, from greis ‘grey with age’
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definition by Oxford Dictionaries