Definition of O

Noun

  • the blood group whose red cells carry neither the A nor B antigens
    "people with type O blood are universal donors"
    - type o - group o
  • the 15th letter of the Roman alphabet
  • 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
    - atomic number 8
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

Word games points for the O

  • Scrabble® score of the o (1)
  • Word Chums® score of the o (1)
  • Words With Friends® score of the o (1)