|pälē, -lə̇+ noun
Etymology: poly- + styrene
: a polymer of styrene ; especially : a rigid transparent thermoplastic characterized by good physical and electrical insulating properties, low moisture absorption, and yellowing in sunlight and used either unmodified or sometimes modified (as for improving impact strength or heat resistance) chiefly in making containers and other molded products (as for radios, electrical apparatus, refrigerators) and sheet materials — compare styrene plastic