POLYBUTYLENE

\pˌɒlɪbjˈuːtɪlˌiːn], \pˌɒlɪbjˈuːtɪlˌiːn], \p_ˌɒ_l_ɪ_b_j_ˈuː_t_ɪ_l_ˌiː_n]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd