o


Meanings

  • 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
  • the 15th letter of the Roman alphabet
  • the blood group whose red cells carry neither the A nor B antigens;
    • "people with type O blood are universal donors"


o is not a valid Scrabble word

o is not valid in Words With Friends