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.
ABS chairs are meant to be much more expensive than polypropylene chairs whereas the overall strength of ABS steals a march over polypropylene. ABS has a tensile strength of about 5500 psi, while polypropylene has a tensile strength of about 4000 psi. ABS is also comparatively harder and lighter. So it's fairly obvious that ABS is the stronger material out of the two.