plural noun slick·ens \ˈslikənz\

Definition of slickens

  1. 1a :  the thin layer of extremely fine silt sometimes deposited by flood waters of a stream b :  finely pulverized material from a quartz mill or washings of lighter earth sluiced away in hydraulic mining

  2. 2 :  slickenside

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Origin and Etymology of slickens

probably irregular from slick finely pounded ore, from German schlich slime — more at schlich

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