Definition of noble gas noun from the Oxford Advanced Learner's Dictionary


noble gas

BrE BrE//ˌnəʊbl ˈɡæs//
; NAmE NAmE//ˌnoʊbl ˈɡæs//
(also inert gas, rare gas) (chemistry)
jump to other results
any of a group of gases that do not react with other chemicals. Argon, helium, krypton and neon are noble gases.
See the Oxford Advanced American Dictionary entry: noble gas