Synonyms and definition of the word or term

O

noun

  • S: (n) atomic number 8 , oxygen 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.
  • S: (n) group o , type o the blood group whose red cells carry neither the A nor B antigens. (people with type O blood are universal donors)

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