Kryp"ton (?), n. [NL., fr. Gr. &?; , neut. of &?; hidden.] (Chem.) An inert gaseous element of the argon group, occurring in air to the extent of about one volume in a million. It was discovered by Ramsay and Travers in 1898. Liquefying point, -- 152° C.; symbol, Kr; atomic weight, 83.0.

Kryp"ton (?), n. [NL., fr. Gr. &?; , neut. of &?; hidden.] (Chem.) An inert gaseous element of the argon group, occurring in air to the extent of about one volume in a million. It was discovered by Ramsay and Travers in 1898. Liquefying point, -- 152° C.; symbol, Kr; atomic weight, 83.0.

• a chemical element (symbol Kr) with an atomic number of 36; one of the noble gases.
  

• The name of a fictional planet in the Superman comics and films.
  
  German
• krypton