Plastics is the general term for a wie range of synthetic or semisynthetic polymerization products. They are composed of organic condensation or addition polymers and may contain other substances to improve performance or reduce costs. There are many natural polymers generally considered to be "plastics". Plastics can be formed into many different types of objects, or films, or fibers. Their name is derived from the malleability, or plasticity, of many of them. The "s" in "plastics" is there to distinguish between the polymer and the way a material deforms. For example, aluminum is a ductile material and can undergo "plastic" deformation when the material undergoes stress from a force and results in a strain of which it will not return. "Plastics" refers to the polymer material. The word derives from the Greek πλαστικός (plastikos), "fit for molding", from πλαστός (plastos) "molded".