What does aquatint or aquatinta mean?
The definition of aquatint and aquatinta
A”qua*tint, A`qua*tin”ta, n.
Etym: [It. acquatinta dyed water; acqua (L. aqua) water + tinto, fem. tinta, dyed. See Tint.]

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.