The Collaborative International Dictionary of English v.0.48:

Modeling \Mod"el*ing\, n. (Fine Arts)
   The act or art of making a model from which a work of art is
   to be executed; the formation of a work of art from some
   plastic material. Also, in painting, drawing, etc., the
   expression or indication of solid form. [Written also
   modelling.]
   [1913 Webster]

   Modeling plane, a small plane for planing rounded objects.


   Modeling wax, beeswax melted with a little Venice
      turpentine, or other resinous material, and tinted with
      coloring matter, usually red, -- used in modeling.
      [1913 Webster]