greisen

[ grahy-zuhn ]
/ ˈgraɪ zən /

noun

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. 2020

Example sentences from the Web for greisen

British Dictionary definitions for greisen

greisen
/ (ˈɡraɪzən) /

noun

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

Word Origin for greisen

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