thermosetting

/ˌθʌrmoʊˈsɛdɪŋ/
IPA guide

Definitions of thermosetting
  1. adjective
    having the property of becoming permanently hard and rigid when heated or cured
    “the phenol resins and plastics were the original synthetic thermosetting materials”
    synonyms: thermoset
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    antonyms:
    thermoplastic
    having the property of softening or fusing when heated and of hardening and becoming rigid again when cooled
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