We've found 0 definitions containing the term p.o. (4.91 seconds):

«definition»  What does p.o. mean?                a noncommissioned officer in the Navy or Coast Guard with a rank comparable to sergeant in the Army 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 a European river; flows into the Adriatic Sea an independent agency of the federal government responsible for mail delivery (and sometimes telecommunications) between individuals and businesses in the United States

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