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

Example Sentences

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

From Project Gutenberg

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

From Project Gutenberg