| iron manganese tungsten | | |
| n. (substance) | 1. iron manganese tungsten, wolframite | a mineral consisting of iron and manganese tungstate in crystalline form; the principal ore of tungsten; found in quartz veins associated with granitic rocks. |
| ~ atomic number 74, tungsten, w, wolfram | a heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite. |
| ~ mineral | solid homogeneous inorganic substances occurring in nature having a definite chemical composition. |
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