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polytechnic
polytene
polytetrafluoroethylene
polytheism
polythene
polytonality
polytrophic
polytypic
polyunsaturated
polyurethane
polyuria
polyvalent
polyvinyl
polyvinyl acetate
polyvinyl chloride
polyzoan
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polystyrene
pol·y·sty·rene [ pòllee st rn ]


noun 
Definition:
 
synthetic packing or insulating material: a synthetic polymer of styrene that is stable in various physical forms. As a white rigid foam expanded polystyrene it is used for packing and insulation.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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