What is the meaning of Greisen?

(n.) A crystalline rock consisting of quarts and mica, common in the tin regions of Cornwall and Saxony.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). greisen. Retrieved September 26, 2026, from http://smartdefine.org/greisen/definitions/2013675
ChicagoWebster's. 2011. "greisen" http://smartdefine.org/greisen/definitions/2013675 (accessed September 26, 2026).
HarvardWebster's 2011, greisen, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/greisen/definitions/2013675>.
MLAWebster's. "greisen" 27 May 2011. Web. 26 September 2026. <http://smartdefine.org/greisen/definitions/2013675>
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