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| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| thermosetting (ˌθɜːməʊˈsɛtɪŋ) | |
| —adj | |
| Compare thermoplastic (of a material, esp a synthetic plastic or resin) hardening permanently after one application of heat and pressure. Thermosetting plastics, such as phenol-formaldehyde, cannot be remoulded | |
| thermosetting (thûr'mō-sět'ĭng) Pronunciation Key
Relating to a compound that softens when initially heated, but hardens permanently once it has cooled. Thermosetting materials are made of long-chain polymers that cross-link with each other after they have been heated, rendering the substance permanently hard. Compare thermoplastic. |