Noble gas

from WordNet (r) 3.0 (2006)
noble gas
    n 1: any of the chemically inert gaseous elements of the helium
         group in the periodic table [syn: {noble gas}, {inert gas},
         {argonon}]
    
from The Collaborative International Dictionary of English v.0.48
Noble \No"ble\, a. [Compar. {Nobler}; superl. {Noblest}.] [F.
   noble, fr. L. nobilis that can be or is known, well known,
   famous, highborn, noble, fr. noscere to know. See {know}.]
   1. Possessing eminence, elevation, dignity, etc.; above
      whatever is low, mean, degrading, or dishonorable;
      magnanimous; as, a noble nature or action; a noble heart.
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            Statues, with winding ivy crowned, belong
            To nobler poets for a nobler song.    --Dryden.
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   2. Grand; stately; magnificent; splendid; as, a noble
      edifice.
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   3. Of exalted rank; of or pertaining to the nobility;
      distinguished from the masses by birth, station, or title;
      highborn; as, noble blood; a noble personage.
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   Note: Noble is used in the formation of self-explaining
         compounds; as, noble-born, noble-hearted, noble-minded.
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   {Noble gas} (Chem.), a gaseous element belonging to group
      VIII of the periodic table of elements, not combining with
      other elements under normal reaction conditions;
      specifically, {helium}, {neon}, {argon}, {krypton},
      {xenon}, or {radon}; also called {inert gas}.

   {Noble metals} (Chem.), silver, gold, and platinum; -- so
      called from their resistance to oxidation by air and to
      dissolution by acids. Copper, mercury, aluminium,
      palladium, rhodium, iridium, and osmium are sometimes
      included.
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   Syn: Honorable; worthy; dignified; elevated; exalted;
        superior; sublime; great; eminent; illustrious;
        renowned; stately; splendid; magnificent; grand;
        magnanimous; generous; liberal; free.
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