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
Webster's New World
- atomic number 36
Origin of Krypton
Greek krupton neuter of kruptos hidden (from its rarity) from kruptein to hide
From American Heritage Dictionary of the English Language, 5th Edition
Neuter form of Ancient Greek κρυπτός (kruptos, “hidden”).
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