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,
© Webster 1913.