verb

engrave (metal, glass, or stone) by coating it with a protective layer, drawing on it with a needle, and then covering it with acid to attack the parts the needle has exposed, especially in order to produce prints from it.

aquatint is a process of achieving tone by etching a metal plate

engrave,carve,inscribe,cut (in),incise,chisel,chase,score,notch,imprint,impress,deboss,stamp,print,mark

noun

the action or process of etching something.

semiconductor production processes such as plasma etch