Webster's English Dictionary

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etch

1. etch \'ech\ vb [D etsen, fr. G a:tzen, lit., to feed, fr. OHG azzen] 1: 
   to produce esp. on metal or glass by the corrosive action of an acid; 
   (Xalso : to subject to such etching 2: to delineate or impress clearly  : 
   to practice etching  - etch.er n
2. etch n : a chemical agent used in etching