vitrification

/ˌvɪtrəfɪˈkeɪʃən/
noun
  1. The process of turning something into glass or a glass-like solid by heating and then cooling it rapidly.
    • Ancient potters discovered vitrification by accident when their clay vessels were fired at very high temperatures.
    • Vitrification is used to preserve biological samples by cooling them so quickly that ice crystals do not form.
    • The vitrification of nuclear waste involves melting it with glass-forming materials to trap dangerous elements.
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