n In injection molding, a wriggly flow of resin from a small gate into the mold cavity, mistakenly referred to as turbulence and probably related to melt fracture. Jetting is the antithesis of the desired laminar flow forming a smooth flow front across the mold. It can cause strength problems in molded parts because of incomplete welding of the wormlike surfaces of the jet. (Strong AB (2000) Plastics materials and processing. Prentice Hall, Columbus, OH).