資料來源 : pyDict

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資料來源 : Webster's Revised Unabridged Dictionary (1913)

Ytterbium \Yt*ter"bi*um\, n. [NL., fr. Ytterby, in Sweden. See
   {Erbium}.] (Chem.)
   A rare element of the boron group, sometimes associated with
   yttrium or other related elements, as in euxenite and
   gadolinite. Symbol Yb; provisional atomic weight 173.2. Cf.
   {Yttrium}.

   Note: Ytterbium is associated with other rare elements, and
         probably has not been prepared in a pure state.

資料來源 : WordNet®

ytterbium
     n : a soft silvery metallic element; a rare earth of the
         lanthanide series; it occurs in gadolinite and monazite
         and xenotime [syn: {Yb}, {atomic number 70}]