English to English

noun (n)

• soft decayed area in a tooth; progressive decay can lead to the death of a tooth(noun.process)

  Synonym:
  cavity, dental caries, tooth decay
  

  source: wordnet30
• Ulceration of bone; a process in which bone disintegrates and is carried away piecemeal, as distinguished from necrosis, in which it dies in masses.(noun)

  source: webster1913