polyisoprene

[ pol-ee-ahy-suh-preen ]
/ ˌpɒl iˈaɪ səˌprin /

noun Chemistry.

a thermoplastic polymer, (C5H8)n, the major constituent of natural rubber and also obtained synthetically.

Origin of polyisoprene

First recorded in 1930–35; poly- + isoprene

British Dictionary definitions for polyisoprene

polyisoprene
/ (ˌpɒlɪˈaɪsəˌpriːn) /

noun

any of various polymeric forms of isoprene, occurring in rubbers