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greisen

[grahy-zuh n]
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noun
  1. a hydrothermally altered rock of granitic texture composed chiefly of quartz and mica, common in the tin mines of Europe.
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Origin of greisen

Borrowed into English from German around 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for greisen

Historical Examples

  • Greisen occurs typically in belts or veins intersecting granite.

    Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5

    Various

  • Greisen is closely connected with schorl rock both in its mineralogical composition and in its mode of origin.

British Dictionary definitions for greisen

greisen

noun
  1. a light-coloured metamorphic rock consisting mainly of quartz, white mica, and topaz formed by the pneumatolysis of granite
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Word Origin

C19: from German, from greissen to split
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012