DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   tracing
       n 1: the act of drawing a plan or diagram or outline
       2: a drawing created by superimposing a semitransparent sheet of
          paper on the original image and copying on it the lines of
          the original image [syn: tracing, trace]
       3: the discovery and description of the course of development of
          something; "the tracing of genealogies"