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Hail: precipitation of ice pellets when there are strong rising air currents; to praise vociferously. O: the blood group whose red cells carry neither the A nor B antigens; "people with type O blood are universal donors"; the atomic symbol for the element 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. Diver: Anyone diving out of the plane during a formation skydiving exit; someone who dives (into water); someone who works underwater. Active Projects
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