Definition of isoprene noun from the Oxford Advanced American Dictionary

 

isoprene

 noun
noun
NAmE//ˈaɪsəˌprin//
 
[uncountable]
 
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a liquid hydrocarbon obtained from petroleum that is used to make artificial rubber. Isoprene is also found in natural rubber.
See the Oxford Advanced Learner's Dictionary entry: isoprene