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English - English (Wordnet) dictionary (also found in Computing (FOLDOC), Vietnamese - Vietnamese)
ar
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Noun
  • a state in south central United States; one of the Confederate states during the American Civil War
  • a unit of surface area equal to 100 square meters
  • a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
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