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PO, petty officer, P.O. | a noncommissioned officer in the Navy or Coast Guard with a rank comparable to sergeant in the Army | |
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Po, polonium, atomic number 84 | a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor | |
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chamberpot, potty, thunder mug, pot, po | a receptacle for urination or defecation in the bedroom | |
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Po, Po River | a European river; flows into the Adriatic Sea | |
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United States Post Office, US Post Office, Post Office, PO | an independent agency of the federal government responsible for mail delivery (and sometimes telecommunications) between individuals and businesses in the United States |