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From Latin crucibulum (night-lamp, metallurgic melting-pot), apparently a derivative of crux (cross), perhaps by analogy to thūribulum (censer) and suffix -bulum.


  • IPA(key): /ˈkɹuː.sɪ.bəl/


crucible (plural crucibles)

  1. (chemistry) A cup-shaped piece of laboratory equipment used to contain chemical compounds when heating them to very high temperatures.
  2. A heat-resistant container in which metals are melted, usually at temperatures above 500°C, commonly made of graphite with clay as a binder.
  3. The bottom and hottest part of a blast furnace; the hearth.
  4. A very difficult and trying experience, that acts as a refining or hardening process.


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