Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A gas that is not chemically reactive, especially a noble gas.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun chemistry A gas which does not undergo chemical reactions.
  • noun chemistry, specifically A noble gas.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun any of the chemically inert gaseous elements of the helium group in the periodic table

Etymologies

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Examples

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