/re'treuh sahzh"/ ; Fr. /rddeuh trddooh sannzh"/ , n.
the technique or action, in etching or engraving, of drawing up ink from within the incised lines of an inked plate by deftly passing a soft cloth across its surface in order to spread ink to the adjacent areas.
[ 1955-60; retrouss ( er ) (see RETROUSSÉ) + -age -AGE ]