\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.