aquatint

/AH0 K W AA1 T IH0 N T/
noun
  1. 1

    A form of etching with acid on a plate partially covered with varnish that produces a print somewhat resembling a watercolour.

  2. 2

    An etching or print made using this method.

verb
  1. 1

    To make such etchings.

Source: https://en.wiktionary.org/wiki/aquatint