Word Origin & History
wackerock 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).