an independent agency of the federal government responsible for mail delivery (and sometimes telecommunications) between individuals and businesses in the United States;
a European river; flows into the Adriatic Sea;
a noncommissioned officer in the navy 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;
