Definition of rare gas in US English:

rare gas


  • another term for noble gas
    • ‘There is reason to believe that we might profitably mine for rare gases in the dusty regolith.’
    • ‘These elements have been known as the rare gases, but some of them are not especially rare.’
    • ‘The lamp includes a bulbous envelope filled with rare gas and metal vapor and a reentrant cavity.’
    • ‘Both utilize large, long-lived, and relatively expensive bulbs filled with various combinations of rare gases and a remote ballast.’
    • ‘The low reactivity of the rare gases is due to the arrangement of electrons in the rare gas atoms.’


rare gas

/rɛ(ə)r ɡæs/