How to say o ?



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What is the definition of o ?

  1. the 15th letter of the Roman alphabet
  2. a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
  3. the blood group whose red cells carry neither the A nor B antigens

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