noun Date: circa 1909 a refractory shiny black crystalline compound B 4 C that is one of the hardest known materials and is used especially in abrasives and as a structural reinforcing material
BORON CARBIDE
Meaning of BORON CARBIDE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012