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.
Pacific West outlines differences between acrylic and polycarbonate plastic products. Both acrylic and polycarbonate are rigid plastic products and are available in clear plastic sheet, rod and tube form which are transparent and almost glass like in appearance. This is where the similarities end, however, as these plastic products perform different roles.