365bet中国官方网站

  • word of the day

    ytterbium

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

    Definition
    (noun) a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime
    Synonyms : atomic number 70 , yb
  • Download our Mobile App Today