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wacke

 - 2 dictionary results

wack⋅e

[wak-uh]
–noun
a poorly sorted sandstone containing fragments of rock and minerals in a clayey matrix.
Compare graywacke.


Origin:
1795–1805; < G: a kind of stone
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Word Origin & History

wacke 
rock resembling sandstone, 1803, from Ger. Wacke, from M.H.G. wacke "a large stone," from O.H.G. wacko "gravel," probably from O.H.G. wegan "to move." A miner's word, brought into geology by Ger. geologist Abraham Gottlob Werner (1750-1817).
Online Etymology Dictionary, © 2001 Douglas Harper
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