alundum
9.9
A hard material from melted aluminium oxide used to sharpen and smooth tools
- noun
- Specialized
:
alundum
- Grinding wheels are often made from alundum because of its durability.
Examples
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The laboratory uses alundum crucibles for high-temperature experiments.
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He bought a block of alundum to sharpen his tools.
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The factory uses alundum for grinding metal.
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Is alundum effective for polishing surfaces?
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Grinding wheels are often made from alundum due to its excellent abrasive properties.
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He purchased a block of alundum to use for sharpening his tools.
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The laboratory relies on alundum crucibles for conducting high-temperature experiments.
Synonyms
1
8.9
A hard white material used to make ceramics, glass and aluminum
is the fused processed form used especially as an abrasive and refractory material
Surface Forms
Etymology
Alundum comes from the familiar word alum and from alumina, names for the very hard form of aluminum made by heat. So alundum is a very hard material used for grinding and for things that must stand high heat.