Styrofoam vs. Polystyrene

Styrofoam and Polystyrene Definitions
Styrofoam
Expanded polystyrene foam, such as is used in cups and packaging.
Polystyrene
A rigid clear thermoplastic polymer of styrene that can be molded into objects or made into a foam that is used as thermal insulation.
Styrofoam
A light resilient foam of polystyrene
Polystyrene
(organic chemistry) A vinylic polymer of styrene, CH2CHphenyl.
Polystyrene
(organic chemistry) An alkane chain of benzene molecules, RCH2CHphenylR.
Polystyrene
A polymer of styrene; a rigid transparent thermoplastic;
Expanded polystyrene looks like a rigid white foam and is used as packing or insulation
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