1. (noun) praseodymium, Pr, atomic number 59
a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
Synonyms: praseodymium, public relations, atomic number 59
2. (noun) Puerto Rico, Porto Rico, Commonwealth of Puerto Rico, PR
a self-governing commonwealth associated with the United States occupying the island of Puerto Rico
Synonyms: praseodymium, public relations, atomic number 59
3. (noun) public relations, PR
a promotion intended to create goodwill for a person or institution
Synonyms: praseodymium, public relations, atomic number 59
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Synonyms and Antonyms of Pr 
