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  1. a poorly sorted sandstone containing fragments of rock and minerals in a clayey matrix.
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Compare graywacke.

Origin of wacke

1795–1805; < German: a kind of stone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for wacke

mud, brick, earth, pottery, slip, till, adobe, bole, marl, loam, loess, kaolin, argil, wacke

Examples from the Web for wacke

Historical Examples of wacke

British Dictionary definitions for wacke


  1. obsolete any of various soft earthy rocks that resemble or are derived from basaltic rocks
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Word Origin for wacke

C18: from German: rock, gravel, basalt
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

Word Origin and History for wacke


rock resembling sandstone, 1803, from German Wacke, from Middle High German wacke "a large stone," from Old High German wacko "gravel," probably from Old High German wegan "to move." A miner's word, brought into geology by German geologist Abraham Gottlob Werner (1750-1817).

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Online Etymology Dictionary, © 2010 Douglas Harper