Dictionary

noble gas

noun

Definition of NOBLE GAS

:  any of a group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates —called also inert gas

First Known Use of NOBLE GAS

1902

noble gas

noun no·ble gas \ˈnō-bəl-\   (Medical Dictionary)

Medical Definition of NOBLE GAS

:  any of a group of rare gases that include helium, neon, argon, krypton, xenon, and sometimes radon and that exhibit great stability and extremely low reaction rates—called also inert gas

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