a rare, gaseous chemical element, one of the noble gases, present in very small quantities in air: basically inert, it reacts with fluorine and some other elements under special conditions: symbol, Kr; at. no. 36
Origin of kryptonModL: so named (1898) by Sir William Ramsay and M. W. Travers (1872-1961), British chemists, its discoverers ; from Classical Greek krypton, neuter of kryptos, hidden (see crypt), in reference, refer to their difficulty in isolating it
A colorless, largely inert gaseous element used chiefly in gas discharge lamps and fluorescent lamps. Atomic number 36; atomic weight 83.80; melting point −157.36°C; boiling point −153.34°C; density 3.733 grams per liter (0°C). See Periodic Table.
Origin of kryptonGreek krupton, neuter of kruptos, hidden (from its rarity), from kruptein, to hide.
- A chemical element (symbol Kr) with an atomic number of 36; one of the noble gases.
Neuter form of Ancient Greek κρυπτός (kruptos, “hidden”).