資料來源 : pyDict

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

Molybdenum \Mol`yb*de"num\, n. [NL.: cf. F. molybd[`e]ne. See
   {Molybdena}.] (Chem.)
   A rare element of the chromium group, occurring in nature in
   the minerals molybdenite and wulfenite, and when reduced
   obtained as a hard, silver-white, difficulty fusible metal.
   Symbol Mo. Atomic weight 95.9.

資料來源 : WordNet®

molybdenum
     n : a polyvalent metallic element that resembles chromium and
         tungsten in its properties; used to strengthen and harden
         steel [syn: {Mo}, {atomic number 42}]