Definitions

wolfram

wolfram

[wool-fruhm, vawl-]
wolfram: see tungsten.
or wolfram

Metallic chemical element, one of the transition elements, chemical symbol W, atomic number 74. Exceptionally strong, white to grayish, and brittle, it has the highest melting point (6,170 °F [3,410 °C]), greatest high-temperature strength, and lowest thermal expansion coefficient of any metal. Its chief uses are in steels to increase hardness and strength and in lightbulb filaments (see incandescent lamp). It is also used in electrical contacts, rocket nozzles, chemical apparatus, high-speed rotors, and solar-energy devices. Tungsten is relatively inert, but compounds (in which it has various valences) are known. The most important, tungsten carbide, noted for its hardness, is used to increase the wear-resistance of cast iron and of tools' cutting edges.

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(born circa 1170—died circa 1220) German poet. An impoverished Bavarian knight, Wolfram apparently served a succession of lords. The epic “Parzival,” one of his eight surviving lyric poems, is one of the masterpieces of the Middle Ages; likely based on a romance by Chrétien de Troyes, it introduced the theme of the Holy Grail into German literature. Richard Wagner used it as the basis for his last opera, Parsifal (1882). Wolfram's influence on later poets was profound, and, with Hartmann von Aue and Gottfried von Strassburg, he is one of the three great Middle High German epic poets.

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