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Definitions of pr
  1. noun
    a self-governing commonwealth associated with the United States occupying the island of Puerto Rico
  2. noun
    a promotion intended to create goodwill for a person or institution

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  3. noun
    a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
Explanation of pr
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