tracing in WordNet English dictionary

1. a drawing created by superimposing a semitransparent sheet of paper on the original image and copying on it the lines of the original image
   tracing  trace 
   
2. the act of drawing a plan or diagram or outline
   tracing 
   
3. the discovery and description of the course of development of something
   "the tracing of genealogies"
   tracing