\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.