aqua·tint /ˈækwəˌtɪnt, ˈɑ-/
  銅版腐蝕法的一種版畫
  A·qua·tint A·qua·tin·ta n.  A kind of etching in which spaces are bitten by the use of aqua fortis, by which an effect is produced resembling a drawing in water colors or India ink; also, the engraving produced by this method.
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  aquatint
       n 1: an etching made by a process that makes it resemble a water
            color
       2: a method of etching that imitates the broad washes of a
          water color
       v : etch in aquatint