What does PR mean in Unclassified?
This page is about the meanings of the acronym/abbreviation/shorthand PR in the Miscellaneous field in general and in the Unclassified terminology in particular.
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What does PR mean?
- praseodymium, Pr, atomic number 59(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