English to English

noun (n)

• worthless or dangerous material that should be removed

  tak berharga atau bahan berbahaya itu harus disingkirkan

  Synonym:
  impurity
  

  source: wordnet30
• the scum formed by oxidation at the surface of molten metals

  sampah yang dibentuk oleh pengoksidaan di permukaan logam cair

  Synonym:
  scoria, slag
  

  source: wordnet30
• The scum or refuse matter which is thrown off, or falls from, metals in smelting the ore, or in the process of melting; recrement.

  sampah atau menolak masalah yang terlempar, atau jatuh dari, the bijih besi di lebur, atau dalam proses mencair; recrement.

  source: webster1913