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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).
