[1] : The Collaborative International Dictionary of English v.0.48

tungsten \tung"sten\ tu^ng"ste^n, n. sw. tungsten cf.
   dan. tungsteen, g. tungstein; tung heavy akin to dan. tung,
   icel. thornungr + 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.
      1913 webster

   2. min. scheelite, or calcium tungstate. obs.
      1913 webster

   tungsten ocher, or tungstic ocher min., tungstite.
      1913 webster
see also:
stone tungsten ocher tungstic ocher 

Tungsten >> T Words
Tungsten, definition of term: Tungsten
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Ocher >> O Words
Ocher, definition of term: Ocher
ocher_pag1.html