The Collaborative International Dictionary
Aquatinta
Aquatint \A"qua*tint\, Aquatinta \A`qua*tin"ta\, n. [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.
Wiktionary
aquatinta
n. (context dated arts English) aquatint