GR-S

noun

¦jēˌär¦es

variants or less commonly GR-S rubber

: any of a class of general-purpose synthetic rubbers that are made by copolymerizing emulsions of butadiene and styrene commonly at a temperature of either 122° F or 41° F and that are used especially in tires see cold rubber

Word History

Etymology

g overnment r ubber + s tyrene

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