praseodymium

Từ điển WordNet v3.1 - WordNet Dictionary

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
• Syn:
Pr, atomic number 59
• Hypernyms:
metallic element, metal
• Substance Holonyms:
bastnasite, bastnaesite, monazite

• Từ đồng nghĩa / Synonyms:
  Pr, atomic number 59