O
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(noun) 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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Synonyms: group O, type O |
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Related Words: blood group, blood type |
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| 2. |
(noun) a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 28 percent of the atmosphere by volume; the most abundant element in the earth's crust |
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Synonyms: atomic number 8, oxygen |
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Related Words: LOX, chemical element, element, gas, liquid oxygen |
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