Chem.
any of the chemically inert gaseous elements of group 8A or 0 of the periodic table: helium, neon, argon, krypton, xenon, and radon. Also called inert gas .
[ 1900-05 ]
Chem.
any of the chemically inert gaseous elements of group 8A or 0 of the periodic table: helium, neon, argon, krypton, xenon, and radon. Also called inert gas .
[ 1900-05 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012