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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.


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: B 4 C
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Example Sentences

Tiny diny-teeth, smaller than the heads of pins, were still authentic boron carbide.

In fact, diny teeth, being organic, seemed to be an especially hard form of boron carbide.

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boronboron hydride