/krip"ton/ , n. Chem.
an inert, monatomic gaseous element, present in very small amounts in the atmosphere: used in high-power, tungsten-filament light bulbs. Symbol: Kr; at. wt.: 83.80; at. no.: 36.
[ 1895-1900; kryptón, neut. of kryptós hidden, secret; see CRYPT ]