Chem.
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.
Chem.
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.
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012