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1. WordNet® 3.0 (2006)
    n 1: a colorless element that is one of the six inert gasses;
         occurs in trace amounts in air [syn: krypton, Kr,
         atomic number 36]

2. 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.
      [1913 Webster]

            Statues, with winding ivy crowned, belong
            To nobler poets for a nobler song.    --Dryden.
      [1913 Webster]

   2. Grand; stately; magnificent; splendid; as, a noble
      [1913 Webster]

   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.
      [1913 Webster]

   Note: Noble is used in the formation of self-explaining
         compounds; as, noble-born, noble-hearted, noble-minded.
         [1913 Webster]

   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
      [1913 Webster]

   Syn: Honorable; worthy; dignified; elevated; exalted;
        superior; sublime; great; eminent; illustrious;
        renowned; stately; splendid; magnificent; grand;
        magnanimous; generous; liberal; free.
        [1913 Webster]

3. The Collaborative International Dictionary of English v.0.48
Krypton \Kryp"ton\ (kr[i^]p"t[o^]n), n. [NL., fr. Gr. krypto`n,
   neut. of krypto`s hidden.] (Chem.)
   An inert gaseous element of the argon (noble gas) group, of
   atomic number 36, occurring in air to the extent of about one
   volume in a million. It was discovered by Ramsay and Travers
   in 1898. Boiling point, -152.3[deg] C.; melting point,
   -156.6[deg] C.; symbol, Kr; atomic weight, 83.8.
   [Webster 1913 Suppl.]

4. The Elements (07Nov00)
Symbol: Kr
Atomic number: 36
Atomic weight: 83.80
Colorless gaseous element, belongs to the noble gases. Occurs in the
0.0001% by volume. It can be extracted from liquid air by fractional
distillation. Generally not isolated, but used with other inert gases in
fluorescent lamps. Five natural isotopes, and five radioactive isotopes.
Kr-85, the most stable radioactive isotope, has a half-life of 10.76
years and is produced in fission reactors. Practically inert, though
to form compounds with fluorine.

5. The Free On-line Dictionary of Computing (30 December 2018)

    A frame language.

   ["An Essential Hybrid Reasoning System: Knowledge and Symbol
   Level Accounts of KRYPTON", R.J. Brachman et al, Proc
   IJCAI-85, 1985].


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