infusibility

/ɪnˌfjuzəˈbɪləti/
noun
  1. The quality or state of being impossible to melt or fuse, especially under high heat.
    • The infusibility of this alloy makes it ideal for furnace parts.
    • Scientists study the infusibility of certain rocks for industrial uses.
    • The material's infusibility was tested at over 3000 degrees Fahrenheit.
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