Source : Webster's Revised Unabridged Dictionary (1913)

Tungsten \Tung"sten\, n. [Sw. tungsten (cf. Dan. tungsteen, G.
   tungstein); tung heavy (akin to Dan. tung, Icel. [thorn]ungr)
   + sten stone. See {Stone}.]
   1. (Chem.) A rare element of the chromium group found in
      certain minerals, as wolfram and scheelite, and isolated
      as a heavy steel-gray metal which is very hard and
      infusible. It has both acid and basic properties. When
      alloyed in small quantities with steel, it greatly
      increases its hardness. Symbol W (Wolframium). Atomic
      weight, 183.6. Specific gravity, 18.

   2. (Min.) Scheelite, or calcium tungstate. [Obs.]

   {Tungsten ocher}, or {Tungstic ocher} (Min.), tungstate.