THERMOPLASTIC Meaning of THERMOPLASTIC in English thermoplastic BrE AmE ˌθɜːm ə ʊ ˈplæst ɪk ◂ -ˈplɑːst- AmE \ ˌθɝːm ə-▷ thermoplastic|s s Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012