Tŭng'sten, n.

n. [Sw. tungsten, Dan. tungsteen, Ger. tungstein, from Sw. & Dan. tung, heavy, and Sw. sten, Dan. steen, Ger. stein, stone; Fr. tungstène.]

1. A metal of a grayish-white color, and considerable luster, discovered by D’Elhuyart in 1781. It is brittle, nearly as hard as steel, and is fused with extreme difficulty. Its specific gravity is near 17.6. When heated to redness in the open air, it takes fire, and is converted into tungstic acid. It is sometimes called wolframium.
2. (Min.) The mineral tungstate of lime. [Obs.]

Tungsten ocker (Min.), a yellow or yellowish-green mineral occurring either earthy or in crystals, consisting of pure tungstic acid; wolframine;—called also tungstic ocker.»