American Heritage® Dictionary of the English Language, Fourth Edition
- n. A very hard, heat-resistant steel containing tungsten.
GNU Webster's 1913
- n. (Metal.) a variety of steel containing a small amount of tungsten, and noted for its tenacity and hardness, as well as for its malleability and tempering qualities. It is also noted for its magnetic properties.
- (Metal.) A steel containing a small amount of tungsten, noted for tenacity and hardness, even under a considerable degree of heat. Magnets made of it are said to be highly permanent. It often contains manganese.
- n. a very hard heat-resistant steel containing tungsten
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