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boron carbide

noun, Chemistry
1.
a black, crystalline, extremely hard, water-insoluble solid, B 4 C, used chiefly as a moderator in nuclear reactors, as an abrasive, and as a refractory.
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  • In fact, diny teeth, being organic, seemed to be an especially hard form of boron carbide.

    Attention Saint Patrick William Fitzgerald Jenkins
British Dictionary definitions for boron carbide

boron carbide

noun
1.
a black extremely hard inert substance having a high capture cross section for thermal neutrons. It is used as an abrasive and refractory and in control rods in nuclear reactors. Formula: B4C
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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