Bronze-casting method. A model is made of wax and enclosed in an envelope of clay and plaster, with a small hole in the bottom. When heat is applied, the wax melts... Found on http://www.encyclo.co.uk/local/20688
Lost wax: a bronze-casting technique of filling the space between the core and the mould after the core's wax coating has been melted away. Found on http://www.encyclo.co.uk/local/21299