aq·ua·tint 
(ăkwə-tĭnt′, äkwə-)
(ăkwə-tĭnt′, äkwə-)n.
1. A process of etching capable of producing several tones by varying the etching time of different areas of a copper plate so that the resulting print resembles the flat tints of an ink or wash drawing.
2. An etching made by this process.
[French aquatinte, from Italian acquatinta : acqua, water (from Latin aqua; see AQUA) + tinta, dyed (from Latin tincta, feminine past participle of tingere, to dye).]
aqua·tint′ v.
aqua·tint′er, aqua·tint′ist n.