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Carborundum

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.03 sec.
Carborundum: see silicon carbide silicon carbide, chemical compound, SiC, that forms extremely hard, dark, iridescent crystals that are insoluble in water and other common solvents. Widely used as an abrasive, it is marketed under such familiar trade names as Carborundum and Crystolon.
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Carborundum

Trademark name of silicon carbide, an inorganic compound discovered in the 1880s by E.G. Acheson. Carborundum has a crystal structure like that of diamond and is almost as hard. It is used as an abrasive for cutting, grinding, and polishing, as an antislip additive, and as a refractory.
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They are built of enormous blocks of carborundum, and the task of entering the city seemed, to my escort of green warriors, an impossibility.
A Princess of Mars by Burroughs, Edgar Rice View in context
The floor, ceiling and walls were of carborundum aluminum, a light, impenetrable composition extensively utilized in the construction of Martian fighting ships.
The Gods of Mars by Burroughs, Edgar Rice View in context
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