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    o

    o - Dictionary definition and meaning for word o

    Definition
    (noun) 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
    Definition
    (noun) the 15th letter of the Roman alphabet Definition
    (noun) the blood group whose red cells carry neither the A nor B antigens
    Synonyms : group o , type o
    Example Sentence
    • people with type O blood are universal donors
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