O Meaning

There are 3 meaning(s) for word O

O Meaning 1 : the blood group whose red cells carry neither the A nor B antigens

    Example : people with type O blood are universal donors

    Synonyms : group o,  type o
O Meaning 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

    Synonyms : atomic number 8,  oxygen
O Meaning 3 : the 15th letter of the Roman alphabet

How to Pronounce O