The term PARTING TOOL can be defined as a tool used in metalworking to separate two pieces of metal. The crossword solution for this term is COMB, which is a four-letter word. A COMB is a tool with a row of teeth that is used to style hair or to remove tangles from it. In metalworking, a parting tool is a type of cutting tool that is used to separate two pieces of metal by cutting a groove between them. It is similar to a COMB in that it has a row of teeth, but the teeth are much sharper and are used to cut into the metal.