Open to two or more interpretations; or of uncertain nature or significance; or (often) intended to mislead. Synonyms: ambiguous; equivocal. Context examples:
Polypropylene, also know as polypropene is a form of plastic just as polyethylene is. What separates polypropylene from polyethylene for starters is the fact that polypropylene can be molded in essence becoming pliable above a certain temperature. When it cools it will return to its solid state.
Polystyrene is a strong plastic that can be injected, extruded or blow molded while styrofoam is a popular foam polystyrene packaging. Invention of Polystyrene and Styrofoam Search the site GO