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polyisoprene

[pol-ee-ahy-suh-preen] /ˌpɒl iˈaɪ səˌprin/
noun, Chemistry
1.
a thermoplastic polymer, (C 5 H 8) n , the major constituent of natural rubber and also obtained synthetically.
Origin
1930-1935
1930-35; poly- + isoprene
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for poly-isoprene

polyisoprene

/ˌpɒlɪˈaɪsəˌpriːn/
noun
1.
any of various polymeric forms of isoprene, occurring in rubbers
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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