inert gas

noun

Chemistry.

1. noble gas.

inert gas

noun

1. Also called: noble gas.  rare gas.  argonon. any of the unreactive gaseous elements helium, neon, argon, krypton, xenon, and radon

2. (loosely) any gas, such as carbon dioxide, that is nonoxidizing

inert gas

1. See noble gas

Word History and Origins

Origin of inert gas¹

First recorded in 1900–05