365bet中国官方网站

  • word of the day

    praseodymium

    praseodymium - 365bet中国官方网站 definition and meaning for word praseodymium

    Definition
    (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
    Synonyms : atomic number 59 , pr
  • Download our Mobile App Today