From Longman Dictionary of Contemporary EnglishRelated topics: Plasticspolystyrenepol‧y‧sty‧rene /ˌpɒlɪˈstaɪriːn◂ $ ˌpɑː-/ noun [uncountable]British EnglishHCP a soft light plastic material that preventsheat or cold from passing through it, used especially for making containersExamples from the Corpuspolystyrene• polystyrenecups• Approximatemeasurements of the enthalpy change for reactions in solution can be made using a simple calorimeter such as a polystyrenebeaker.• Thus atactic polystyrene is amorphous but isotactic polystyrene is semi-crystalline.• In houses particularly prone to condensation, you can cover walls with a thinlayer of polystyrene before applyingwallpaper.• The recycling of polystyrene, for instance, requires temperatures above 200C and the materials are extensively filtered during the procedure.• Felt prettychipper, as we scraped together enough coins to buy a shared polystyrene cup of milkytea.• Cesar lifted the polystyrenegarden of Red RidingHood, dropped it to the floor and put his foot through it.• I will use a woodenshed lined with polystyrene, possibly with one double-glazed window in the roof.Originpolystyrene(1900-2000)poly- + styrene type of chemical compound ((19-21 centuries)) (from Latinstyrax type of plant)